diff --git a/packages/smooth_app/android/Gemfile.lock b/packages/smooth_app/android/Gemfile.lock
index e4c808f5cc6..b087ba1e0f8 100644
--- a/packages/smooth_app/android/Gemfile.lock
+++ b/packages/smooth_app/android/Gemfile.lock
@@ -16,7 +16,7 @@ GEM
     artifactory (3.0.17)
     atomos (0.1.3)
     aws-eventstream (1.3.0)
-    aws-partitions (1.980.0)
+    aws-partitions (1.984.0)
     aws-sdk-core (3.209.1)
       aws-eventstream (~> 1, >= 1.3.0)
       aws-partitions (~> 1, >= 1.651.0)
@@ -25,7 +25,7 @@ GEM
     aws-sdk-kms (1.94.0)
       aws-sdk-core (~> 3, >= 3.207.0)
       aws-sigv4 (~> 1.5)
-    aws-sdk-s3 (1.166.0)
+    aws-sdk-s3 (1.167.0)
       aws-sdk-core (~> 3, >= 3.207.0)
       aws-sdk-kms (~> 1)
       aws-sigv4 (~> 1.5)
@@ -44,7 +44,7 @@ GEM
     domain_name (0.6.20240107)
     dotenv (2.8.1)
     emoji_regex (3.2.3)
-    excon (0.111.0)
+    excon (0.112.0)
     faraday (1.10.4)
       faraday-em_http (~> 1.0)
       faraday-em_synchrony (~> 1.0)
@@ -74,7 +74,7 @@ GEM
     faraday_middleware (1.2.1)
       faraday (~> 1.0)
     fastimage (2.3.1)
-    fastlane (2.223.1)
+    fastlane (2.224.0)
       CFPropertyList (>= 2.3, < 4.0.0)
       addressable (>= 2.8, < 3.0.0)
       artifactory (~> 3.0)
@@ -160,7 +160,7 @@ GEM
     httpclient (2.8.3)
     jmespath (1.6.2)
     json (2.7.2)
-    jwt (2.9.1)
+    jwt (2.9.3)
       base64
     mini_magick (4.13.2)
     mini_mime (1.1.5)
@@ -179,7 +179,7 @@ GEM
       trailblazer-option (>= 0.1.1, < 0.2.0)
       uber (< 0.2.0)
     retriable (3.1.2)
-    rexml (3.3.7)
+    rexml (3.3.8)
     rouge (2.0.7)
     ruby2_keywords (0.0.5)
     rubyzip (2.3.2)
@@ -203,13 +203,13 @@ GEM
     uber (0.1.0)
     unicode-display_width (2.6.0)
     word_wrap (1.0.0)
-    xcodeproj (1.25.0)
+    xcodeproj (1.25.1)
       CFPropertyList (>= 2.3.3, < 4.0)
       atomos (~> 0.1.3)
       claide (>= 1.0.2, < 2.0)
       colored2 (~> 3.1)
       nanaimo (~> 0.3.0)
-      rexml (>= 3.3.2, < 4.0)
+      rexml (>= 3.3.6, < 4.0)
     xcpretty (0.3.0)
       rouge (~> 2.0.7)
     xcpretty-travis-formatter (1.0.1)
diff --git a/packages/smooth_app/assets/app/release_icon_transparent_1152x1152.png b/packages/smooth_app/assets/app/release_icon_transparent_1152x1152.png
deleted file mode 100644
index aae1b7666cf..00000000000
Binary files a/packages/smooth_app/assets/app/release_icon_transparent_1152x1152.png and /dev/null differ
diff --git a/packages/smooth_app/assets/app/release_icon_transparent_70pct_1152x1152.png b/packages/smooth_app/assets/app/release_icon_transparent_70pct_1152x1152.png
deleted file mode 100644
index 630cf46a6c3..00000000000
Binary files a/packages/smooth_app/assets/app/release_icon_transparent_70pct_1152x1152.png and /dev/null differ
diff --git a/packages/smooth_app/ios/Gemfile.lock b/packages/smooth_app/ios/Gemfile.lock
index a0622316070..f11bf6f002a 100644
--- a/packages/smooth_app/ios/Gemfile.lock
+++ b/packages/smooth_app/ios/Gemfile.lock
@@ -16,7 +16,7 @@ GEM
     artifactory (3.0.17)
     atomos (0.1.3)
     aws-eventstream (1.3.0)
-    aws-partitions (1.980.0)
+    aws-partitions (1.984.0)
     aws-sdk-core (3.209.1)
       aws-eventstream (~> 1, >= 1.3.0)
       aws-partitions (~> 1, >= 1.651.0)
@@ -25,7 +25,7 @@ GEM
     aws-sdk-kms (1.94.0)
       aws-sdk-core (~> 3, >= 3.207.0)
       aws-sigv4 (~> 1.5)
-    aws-sdk-s3 (1.166.0)
+    aws-sdk-s3 (1.167.0)
       aws-sdk-core (~> 3, >= 3.207.0)
       aws-sdk-kms (~> 1)
       aws-sigv4 (~> 1.5)
@@ -45,7 +45,7 @@ GEM
     domain_name (0.6.20240107)
     dotenv (2.8.1)
     emoji_regex (3.2.3)
-    excon (0.111.0)
+    excon (0.112.0)
     faraday (1.10.4)
       faraday-em_http (~> 1.0)
       faraday-em_synchrony (~> 1.0)
@@ -75,7 +75,7 @@ GEM
     faraday_middleware (1.2.1)
       faraday (~> 1.0)
     fastimage (2.3.1)
-    fastlane (2.223.1)
+    fastlane (2.224.0)
       CFPropertyList (>= 2.3, < 4.0.0)
       addressable (>= 2.8, < 3.0.0)
       artifactory (~> 3.0)
@@ -161,7 +161,7 @@ GEM
     httpclient (2.8.3)
     jmespath (1.6.2)
     json (2.7.2)
-    jwt (2.9.1)
+    jwt (2.9.3)
       base64
     mini_magick (4.13.2)
     mini_mime (1.1.5)
@@ -180,7 +180,7 @@ GEM
       trailblazer-option (>= 0.1.1, < 0.2.0)
       uber (< 0.2.0)
     retriable (3.1.2)
-    rexml (3.3.7)
+    rexml (3.3.8)
     rouge (2.0.7)
     ruby2_keywords (0.0.5)
     rubyzip (2.3.2)
@@ -209,13 +209,13 @@ GEM
     xcode-install (2.8.1)
       claide (>= 0.9.1)
       fastlane (>= 2.1.0, < 3.0.0)
-    xcodeproj (1.25.0)
+    xcodeproj (1.25.1)
       CFPropertyList (>= 2.3.3, < 4.0)
       atomos (~> 0.1.3)
       claide (>= 1.0.2, < 2.0)
       colored2 (~> 3.1)
       nanaimo (~> 0.3.0)
-      rexml (>= 3.3.2, < 4.0)
+      rexml (>= 3.3.6, < 4.0)
     xcpretty (0.3.0)
       rouge (~> 2.0.7)
     xcpretty-travis-formatter (1.0.1)
diff --git a/packages/smooth_app/lib/background/background_task_add_other_price.dart b/packages/smooth_app/lib/background/background_task_add_other_price.dart
new file mode 100644
index 00000000000..ee0c6bbdaf7
--- /dev/null
+++ b/packages/smooth_app/lib/background/background_task_add_other_price.dart
@@ -0,0 +1,123 @@
+import 'dart:async';
+
+import 'package:flutter/material.dart';
+import 'package:openfoodfacts/openfoodfacts.dart';
+import 'package:provider/provider.dart';
+import 'package:smooth_app/background/background_task.dart';
+import 'package:smooth_app/background/background_task_price.dart';
+import 'package:smooth_app/background/operation_type.dart';
+import 'package:smooth_app/database/local_database.dart';
+
+/// Background task about adding prices to an existing proof.
+class BackgroundTaskAddOtherPrice extends BackgroundTaskPrice {
+  BackgroundTaskAddOtherPrice._({
+    required super.processName,
+    required super.uniqueId,
+    required super.stamp,
+    // single
+    required this.proofId,
+    required super.date,
+    required super.currency,
+    required super.locationOSMId,
+    required super.locationOSMType,
+    // multi
+    required super.barcodes,
+    required super.pricesAreDiscounted,
+    required super.prices,
+    required super.pricesWithoutDiscount,
+  });
+
+  BackgroundTaskAddOtherPrice.fromJson(super.json)
+      : proofId = json[_jsonTagProofId] as int,
+        super.fromJson();
+
+  static const String _jsonTagProofId = 'proofId';
+
+  static const OperationType _operationType = OperationType.addOtherPrice;
+
+  final int proofId;
+
+  @override
+  Map<String, dynamic> toJson() {
+    final Map<String, dynamic> result = super.toJson();
+    result[_jsonTagProofId] = proofId;
+    return result;
+  }
+
+  /// Adds the background task about uploading a product image.
+  static Future<void> addTask({
+    required final BuildContext context,
+    required final int proofId,
+    required final DateTime date,
+    required final Currency currency,
+    required final int locationOSMId,
+    required final LocationOSMType locationOSMType,
+    required final List<String> barcodes,
+    required final List<bool> pricesAreDiscounted,
+    required final List<double> prices,
+    required final List<double?> pricesWithoutDiscount,
+  }) async {
+    final LocalDatabase localDatabase = context.read<LocalDatabase>();
+    final String uniqueId = await _operationType.getNewKey(localDatabase);
+    final BackgroundTask task = _getNewTask(
+      uniqueId: uniqueId,
+      proofId: proofId,
+      date: date,
+      currency: currency,
+      locationOSMId: locationOSMId,
+      locationOSMType: locationOSMType,
+      barcodes: barcodes,
+      pricesAreDiscounted: pricesAreDiscounted,
+      prices: prices,
+      pricesWithoutDiscount: pricesWithoutDiscount,
+    );
+    if (!context.mounted) {
+      return;
+    }
+    await task.addToManager(localDatabase, context: context);
+  }
+
+  /// Returns a new background task about changing a product.
+  static BackgroundTaskAddOtherPrice _getNewTask({
+    required final String uniqueId,
+    required final int proofId,
+    required final DateTime date,
+    required final Currency currency,
+    required final int locationOSMId,
+    required final LocationOSMType locationOSMType,
+    required final List<String> barcodes,
+    required final List<bool> pricesAreDiscounted,
+    required final List<double> prices,
+    required final List<double?> pricesWithoutDiscount,
+  }) =>
+      BackgroundTaskAddOtherPrice._(
+        uniqueId: uniqueId,
+        processName: _operationType.processName,
+        proofId: proofId,
+        date: date,
+        currency: currency,
+        locationOSMId: locationOSMId,
+        locationOSMType: locationOSMType,
+        barcodes: barcodes,
+        pricesAreDiscounted: pricesAreDiscounted,
+        prices: prices,
+        pricesWithoutDiscount: pricesWithoutDiscount,
+        stamp: BackgroundTaskPrice.getStamp(
+          date: date,
+          locationOSMId: locationOSMId,
+          locationOSMType: locationOSMType,
+        ),
+      );
+
+  @override
+  Future<void> execute(final LocalDatabase localDatabase) async {
+    final String bearerToken = await getBearerToken();
+
+    await addPrices(
+      bearerToken: bearerToken,
+      proofId: proofId,
+    );
+
+    await closeSession(bearerToken: bearerToken);
+  }
+}
diff --git a/packages/smooth_app/lib/background/background_task_add_price.dart b/packages/smooth_app/lib/background/background_task_add_price.dart
index f7bcad2d5e1..8e21f72f5c2 100644
--- a/packages/smooth_app/lib/background/background_task_add_price.dart
+++ b/packages/smooth_app/lib/background/background_task_add_price.dart
@@ -2,12 +2,12 @@ import 'dart:async';
 
 import 'package:crop_image/crop_image.dart';
 import 'package:flutter/material.dart';
-import 'package:flutter_gen/gen_l10n/app_localizations.dart';
 import 'package:http_parser/http_parser.dart';
 import 'package:openfoodfacts/openfoodfacts.dart';
 import 'package:provider/provider.dart';
 import 'package:smooth_app/background/background_task.dart';
 import 'package:smooth_app/background/background_task_image.dart';
+import 'package:smooth_app/background/background_task_price.dart';
 import 'package:smooth_app/background/background_task_upload.dart';
 import 'package:smooth_app/background/operation_type.dart';
 import 'package:smooth_app/database/local_database.dart';
@@ -18,12 +18,12 @@ import 'package:smooth_app/query/product_query.dart';
 
 // TODO(monsieurtanuki): use transient file, in order to have instant access to proof image?
 /// Background task about adding a product price.
-class BackgroundTaskAddPrice extends BackgroundTask {
+class BackgroundTaskAddPrice extends BackgroundTaskPrice {
   BackgroundTaskAddPrice._({
     required super.processName,
     required super.uniqueId,
     required super.stamp,
-    // single
+    // proof display
     required this.fullPath,
     required this.rotationDegrees,
     required this.cropX1,
@@ -31,17 +31,17 @@ class BackgroundTaskAddPrice extends BackgroundTask {
     required this.cropX2,
     required this.cropY2,
     required this.proofType,
-    required this.date,
-    required this.currency,
-    required this.locationOSMId,
-    required this.locationOSMType,
-    // lines
     required this.eraserCoordinates,
+    // single
+    required super.date,
+    required super.currency,
+    required super.locationOSMId,
+    required super.locationOSMType,
     // multi
-    required this.barcodes,
-    required this.pricesAreDiscounted,
-    required this.prices,
-    required this.pricesWithoutDiscount,
+    required super.barcodes,
+    required super.pricesAreDiscounted,
+    required super.prices,
+    required super.pricesWithoutDiscount,
   });
 
   BackgroundTaskAddPrice.fromJson(super.json)
@@ -52,73 +52,10 @@ class BackgroundTaskAddPrice extends BackgroundTask {
         cropX2 = json[_jsonTagX2] as int? ?? 0,
         cropY2 = json[_jsonTagY2] as int? ?? 0,
         proofType = ProofType.fromOffTag(json[_jsonTagProofType] as String)!,
-        date = JsonHelper.stringTimestampToDate(json[_jsonTagDate] as String),
-        currency = Currency.fromName(json[_jsonTagCurrency] as String)!,
-        locationOSMId = json[_jsonTagOSMId] as int,
-        locationOSMType =
-            LocationOSMType.fromOffTag(json[_jsonTagOSMType] as String)!,
-        eraserCoordinates =
-            _fromJsonListDouble(json[_jsonTagEraserCoordinates]),
-        barcodes = json.containsKey(_jsonTagBarcode)
-            ? <String>[json[_jsonTagBarcode] as String]
-            : _fromJsonListString(json[_jsonTagBarcodes])!,
-        pricesAreDiscounted = json.containsKey(_jsonTagIsDiscounted)
-            ? <bool>[json[_jsonTagIsDiscounted] as bool]
-            : _fromJsonListBool(json[_jsonTagAreDiscounted])!,
-        prices = json.containsKey(_jsonTagPrice)
-            ? <double>[json[_jsonTagPrice] as double]
-            : _fromJsonListDouble(json[_jsonTagPrices])!,
-        pricesWithoutDiscount = json.containsKey(_jsonTagPriceWithoutDiscount)
-            ? <double?>[json[_jsonTagPriceWithoutDiscount] as double?]
-            : _fromJsonListNullableDouble(json[_jsonTagPricesWithoutDiscount])!,
+        eraserCoordinates = BackgroundTaskPrice.fromJsonListDouble(
+            json[_jsonTagEraserCoordinates]),
         super.fromJson();
 
-  static List<double>? _fromJsonListDouble(final List<dynamic>? input) {
-    if (input == null) {
-      return null;
-    }
-    final List<double> result = <double>[];
-    for (final dynamic item in input) {
-      result.add(item as double);
-    }
-    return result;
-  }
-
-  static List<double?>? _fromJsonListNullableDouble(
-    final List<dynamic>? input,
-  ) {
-    if (input == null) {
-      return null;
-    }
-    final List<double?> result = <double?>[];
-    for (final dynamic item in input) {
-      result.add(item as double?);
-    }
-    return result;
-  }
-
-  static List<String>? _fromJsonListString(final List<dynamic>? input) {
-    if (input == null) {
-      return null;
-    }
-    final List<String> result = <String>[];
-    for (final dynamic item in input) {
-      result.add(item as String);
-    }
-    return result;
-  }
-
-  static List<bool>? _fromJsonListBool(final List<dynamic>? input) {
-    if (input == null) {
-      return null;
-    }
-    final List<bool> result = <bool>[];
-    for (final dynamic item in input) {
-      result.add(item as bool);
-    }
-    return result;
-  }
-
   static const String _jsonTagImagePath = 'imagePath';
   static const String _jsonTagRotation = 'rotation';
   static const String _jsonTagX1 = 'x1';
@@ -126,23 +63,7 @@ class BackgroundTaskAddPrice extends BackgroundTask {
   static const String _jsonTagX2 = 'x2';
   static const String _jsonTagY2 = 'y2';
   static const String _jsonTagProofType = 'proofType';
-  static const String _jsonTagDate = 'date';
   static const String _jsonTagEraserCoordinates = 'eraserCoordinates';
-  static const String _jsonTagCurrency = 'currency';
-  static const String _jsonTagOSMId = 'osmId';
-  static const String _jsonTagOSMType = 'osmType';
-  static const String _jsonTagBarcodes = 'barcodes';
-  static const String _jsonTagAreDiscounted = 'areDiscounted';
-  static const String _jsonTagPrices = 'prices';
-  static const String _jsonTagPricesWithoutDiscount = 'pricesWithoutDiscount';
-  @Deprecated('Use [_jsonTagBarcodes] instead')
-  static const String _jsonTagBarcode = 'barcode';
-  @Deprecated('Use [_jsonTagAreDiscounted] instead')
-  static const String _jsonTagIsDiscounted = 'isDiscounted';
-  @Deprecated('Use [_jsonTagPrices] instead')
-  static const String _jsonTagPrice = 'price';
-  @Deprecated('Use [_jsonTagPricesWithoutDiscount] instead')
-  static const String _jsonTagPriceWithoutDiscount = 'priceWithoutDiscount';
 
   static const OperationType _operationType = OperationType.addPrice;
 
@@ -153,18 +74,8 @@ class BackgroundTaskAddPrice extends BackgroundTask {
   final int cropX2;
   final int cropY2;
   final ProofType proofType;
-  final DateTime date;
-  final Currency currency;
-  final int locationOSMId;
-  final LocationOSMType locationOSMType;
   final List<double>? eraserCoordinates;
 
-  // per line
-  final List<String> barcodes;
-  final List<bool> pricesAreDiscounted;
-  final List<double> prices;
-  final List<double?> pricesWithoutDiscount;
-
   @override
   Map<String, dynamic> toJson() {
     final Map<String, dynamic> result = super.toJson();
@@ -175,15 +86,7 @@ class BackgroundTaskAddPrice extends BackgroundTask {
     result[_jsonTagX2] = cropX2;
     result[_jsonTagY2] = cropY2;
     result[_jsonTagProofType] = proofType.offTag;
-    result[_jsonTagDate] = date.toIso8601String();
-    result[_jsonTagCurrency] = currency.name;
-    result[_jsonTagOSMId] = locationOSMId;
-    result[_jsonTagOSMType] = locationOSMType.offTag;
     result[_jsonTagEraserCoordinates] = eraserCoordinates;
-    result[_jsonTagBarcodes] = barcodes;
-    result[_jsonTagAreDiscounted] = pricesAreDiscounted;
-    result[_jsonTagPrices] = prices;
-    result[_jsonTagPricesWithoutDiscount] = pricesWithoutDiscount;
     return result;
   }
 
@@ -222,14 +125,6 @@ class BackgroundTaskAddPrice extends BackgroundTask {
     await task.addToManager(localDatabase, context: context);
   }
 
-  @override
-  (String, AlignmentGeometry)? getFloatingMessage(
-          final AppLocalizations appLocalizations) =>
-      (
-        appLocalizations.add_price_queued,
-        AlignmentDirectional.center,
-      );
-
   /// Returns a new background task about changing a product.
   static BackgroundTaskAddPrice _getNewTask({
     required final String uniqueId,
@@ -263,20 +158,13 @@ class BackgroundTaskAddPrice extends BackgroundTask {
         pricesAreDiscounted: pricesAreDiscounted,
         prices: prices,
         pricesWithoutDiscount: pricesWithoutDiscount,
-        stamp: _getStamp(
+        stamp: BackgroundTaskPrice.getStamp(
           date: date,
           locationOSMId: locationOSMId,
           locationOSMType: locationOSMType,
         ),
       );
 
-  static String _getStamp({
-    required final DateTime date,
-    required final int locationOSMId,
-    required final LocationOSMType locationOSMType,
-  }) =>
-      'no_barcode;price;$date;$locationOSMId;$locationOSMType';
-
   @override
   Future<void> postExecute(
     final LocalDatabase localDatabase,
@@ -297,9 +185,6 @@ class BackgroundTaskAddPrice extends BackgroundTask {
     }
   }
 
-  @override
-  Future<void> preExecute(final LocalDatabase localDatabase) async {}
-
   @override
   Future<void> execute(final LocalDatabase localDatabase) async {
     final List<Offset> offsets = <Offset>[];
@@ -340,21 +225,7 @@ class BackgroundTaskAddPrice extends BackgroundTask {
       return;
     }
 
-    // authentication
-    final User user = getUser();
-    final MaybeError<String> token =
-        await OpenPricesAPIClient.getAuthenticationToken(
-      username: user.userId,
-      password: user.password,
-      uriHelper: ProductQuery.uriPricesHelper,
-    );
-    if (token.isError) {
-      throw Exception('Could not get token: ${token.error}');
-    }
-    if (token.value.isEmpty) {
-      throw Exception('Unexpected empty token');
-    }
-    final String bearerToken = token.value;
+    final String bearerToken = await getBearerToken();
 
     // proof upload
     final Uri initialImageUri = Uri.parse(path);
@@ -375,48 +246,11 @@ class BackgroundTaskAddPrice extends BackgroundTask {
       throw Exception('Could not upload proof: ${uploadProof.error}');
     }
 
-    for (int i = 0; i < barcodes.length; i++) {
-      final Price newPrice = Price()
-        ..date = date
-        ..currency = currency
-        ..locationOSMId = locationOSMId
-        ..locationOSMType = locationOSMType
-        ..proofId = uploadProof.value.id
-        ..priceIsDiscounted = pricesAreDiscounted[i]
-        ..price = prices[i]
-        ..priceWithoutDiscount = pricesWithoutDiscount[i]
-        ..productCode = barcodes[i];
-
-      // create price
-      final MaybeError<Price> addedPrice =
-          await OpenPricesAPIClient.createPrice(
-        price: newPrice,
-        bearerToken: bearerToken,
-        uriHelper: ProductQuery.uriPricesHelper,
-      );
-      if (addedPrice.isError) {
-        throw Exception('Could not add price: ${addedPrice.error}');
-      }
-    }
-
-    // close session
-    final MaybeError<bool> closedSession =
-        await OpenPricesAPIClient.deleteUserSession(
-      uriHelper: ProductQuery.uriPricesHelper,
+    await addPrices(
       bearerToken: bearerToken,
+      proofId: uploadProof.value.id,
     );
-    if (closedSession.isError) {
-      // TODO(monsieurtanuki): do we really care?
-      // throw Exception('Could not close session: ${closedSession.error}');
-      return;
-    }
-    if (!closedSession.value) {
-      // TODO(monsieurtanuki): do we really care?
-      // throw Exception('Could not really close session');
-      return;
-    }
-  }
 
-  @override
-  bool isDeduplicable() => false;
+    await closeSession(bearerToken: bearerToken);
+  }
 }
diff --git a/packages/smooth_app/lib/background/background_task_price.dart b/packages/smooth_app/lib/background/background_task_price.dart
new file mode 100644
index 00000000000..8d5eb080d57
--- /dev/null
+++ b/packages/smooth_app/lib/background/background_task_price.dart
@@ -0,0 +1,226 @@
+import 'dart:async';
+
+import 'package:flutter/material.dart';
+import 'package:flutter_gen/gen_l10n/app_localizations.dart';
+import 'package:openfoodfacts/openfoodfacts.dart';
+import 'package:smooth_app/background/background_task.dart';
+import 'package:smooth_app/database/local_database.dart';
+import 'package:smooth_app/query/product_query.dart';
+
+/// Abstract background task about adding prices.
+abstract class BackgroundTaskPrice extends BackgroundTask {
+  BackgroundTaskPrice({
+    required super.processName,
+    required super.uniqueId,
+    required super.stamp,
+    // single
+    required this.date,
+    required this.currency,
+    required this.locationOSMId,
+    required this.locationOSMType,
+    // multi
+    required this.barcodes,
+    required this.pricesAreDiscounted,
+    required this.prices,
+    required this.pricesWithoutDiscount,
+  });
+
+  BackgroundTaskPrice.fromJson(super.json)
+      : date = JsonHelper.stringTimestampToDate(json[_jsonTagDate] as String),
+        currency = Currency.fromName(json[_jsonTagCurrency] as String)!,
+        locationOSMId = json[_jsonTagOSMId] as int,
+        locationOSMType =
+            LocationOSMType.fromOffTag(json[_jsonTagOSMType] as String)!,
+        barcodes = json.containsKey(_jsonTagBarcode)
+            ? <String>[json[_jsonTagBarcode] as String]
+            : _fromJsonListString(json[_jsonTagBarcodes])!,
+        pricesAreDiscounted = json.containsKey(_jsonTagIsDiscounted)
+            ? <bool>[json[_jsonTagIsDiscounted] as bool]
+            : _fromJsonListBool(json[_jsonTagAreDiscounted])!,
+        prices = json.containsKey(_jsonTagPrice)
+            ? <double>[json[_jsonTagPrice] as double]
+            : fromJsonListDouble(json[_jsonTagPrices])!,
+        pricesWithoutDiscount = json.containsKey(_jsonTagPriceWithoutDiscount)
+            ? <double?>[json[_jsonTagPriceWithoutDiscount] as double?]
+            : _fromJsonListNullableDouble(json[_jsonTagPricesWithoutDiscount])!,
+        super.fromJson();
+
+  static const String _jsonTagDate = 'date';
+  static const String _jsonTagCurrency = 'currency';
+  static const String _jsonTagOSMId = 'osmId';
+  static const String _jsonTagOSMType = 'osmType';
+  static const String _jsonTagBarcodes = 'barcodes';
+  static const String _jsonTagAreDiscounted = 'areDiscounted';
+  static const String _jsonTagPrices = 'prices';
+  static const String _jsonTagPricesWithoutDiscount = 'pricesWithoutDiscount';
+  @Deprecated('Use [_jsonTagBarcodes] instead')
+  static const String _jsonTagBarcode = 'barcode';
+  @Deprecated('Use [_jsonTagAreDiscounted] instead')
+  static const String _jsonTagIsDiscounted = 'isDiscounted';
+  @Deprecated('Use [_jsonTagPrices] instead')
+  static const String _jsonTagPrice = 'price';
+  @Deprecated('Use [_jsonTagPricesWithoutDiscount] instead')
+  static const String _jsonTagPriceWithoutDiscount = 'priceWithoutDiscount';
+
+  static List<double>? fromJsonListDouble(final List<dynamic>? input) {
+    if (input == null) {
+      return null;
+    }
+    final List<double> result = <double>[];
+    for (final dynamic item in input) {
+      result.add(item as double);
+    }
+    return result;
+  }
+
+  static List<double?>? _fromJsonListNullableDouble(
+    final List<dynamic>? input,
+  ) {
+    if (input == null) {
+      return null;
+    }
+    final List<double?> result = <double?>[];
+    for (final dynamic item in input) {
+      result.add(item as double?);
+    }
+    return result;
+  }
+
+  static List<String>? _fromJsonListString(final List<dynamic>? input) {
+    if (input == null) {
+      return null;
+    }
+    final List<String> result = <String>[];
+    for (final dynamic item in input) {
+      result.add(item as String);
+    }
+    return result;
+  }
+
+  static List<bool>? _fromJsonListBool(final List<dynamic>? input) {
+    if (input == null) {
+      return null;
+    }
+    final List<bool> result = <bool>[];
+    for (final dynamic item in input) {
+      result.add(item as bool);
+    }
+    return result;
+  }
+
+  final DateTime date;
+  final Currency currency;
+  final int locationOSMId;
+  final LocationOSMType locationOSMType;
+
+  // per line
+  final List<String> barcodes;
+  final List<bool> pricesAreDiscounted;
+  final List<double> prices;
+  final List<double?> pricesWithoutDiscount;
+
+  @override
+  Map<String, dynamic> toJson() {
+    final Map<String, dynamic> result = super.toJson();
+    result[_jsonTagDate] = date.toIso8601String();
+    result[_jsonTagCurrency] = currency.name;
+    result[_jsonTagOSMId] = locationOSMId;
+    result[_jsonTagOSMType] = locationOSMType.offTag;
+    result[_jsonTagBarcodes] = barcodes;
+    result[_jsonTagAreDiscounted] = pricesAreDiscounted;
+    result[_jsonTagPrices] = prices;
+    result[_jsonTagPricesWithoutDiscount] = pricesWithoutDiscount;
+    return result;
+  }
+
+  @override
+  (String, AlignmentGeometry)? getFloatingMessage(
+          final AppLocalizations appLocalizations) =>
+      (
+        appLocalizations.add_price_queued,
+        AlignmentDirectional.center,
+      );
+
+  @protected
+  static String getStamp({
+    required final DateTime date,
+    required final int locationOSMId,
+    required final LocationOSMType locationOSMType,
+  }) =>
+      'no_barcode;price;$date;$locationOSMId;$locationOSMType';
+
+  @override
+  Future<void> preExecute(final LocalDatabase localDatabase) async {}
+
+  @protected
+  Future<String> getBearerToken() async {
+    final User user = getUser();
+    final MaybeError<String> token =
+        await OpenPricesAPIClient.getAuthenticationToken(
+      username: user.userId,
+      password: user.password,
+      uriHelper: ProductQuery.uriPricesHelper,
+    );
+    if (token.isError) {
+      throw Exception('Could not get token: ${token.error}');
+    }
+    if (token.value.isEmpty) {
+      throw Exception('Unexpected empty token');
+    }
+    return token.value;
+  }
+
+  @protected
+  Future<void> addPrices({
+    required final String bearerToken,
+    required final int proofId,
+  }) async {
+    for (int i = 0; i < barcodes.length; i++) {
+      final Price newPrice = Price()
+        ..date = date
+        ..currency = currency
+        ..locationOSMId = locationOSMId
+        ..locationOSMType = locationOSMType
+        ..proofId = proofId
+        ..priceIsDiscounted = pricesAreDiscounted[i]
+        ..price = prices[i]
+        ..priceWithoutDiscount = pricesWithoutDiscount[i]
+        ..productCode = barcodes[i];
+
+      // create price
+      final MaybeError<Price> addedPrice =
+          await OpenPricesAPIClient.createPrice(
+        price: newPrice,
+        bearerToken: bearerToken,
+        uriHelper: ProductQuery.uriPricesHelper,
+      );
+      if (addedPrice.isError) {
+        throw Exception('Could not add price: ${addedPrice.error}');
+      }
+    }
+  }
+
+  @protected
+  Future<void> closeSession({
+    required final String bearerToken,
+  }) async {
+    final MaybeError<bool> closedSession =
+        await OpenPricesAPIClient.deleteUserSession(
+      uriHelper: ProductQuery.uriPricesHelper,
+      bearerToken: bearerToken,
+    );
+    if (closedSession.isError) {
+      // TODO(monsieurtanuki): do we really care?
+      // throw Exception('Could not close session: ${closedSession.error}');
+      return;
+    }
+    if (!closedSession.value) {
+      // TODO(monsieurtanuki): do we really care?
+      // throw Exception('Could not really close session');
+      return;
+    }
+  }
+
+  @override
+  bool isDeduplicable() => false;
+}
diff --git a/packages/smooth_app/lib/background/operation_type.dart b/packages/smooth_app/lib/background/operation_type.dart
index 92cee088a82..f1d83e874ce 100644
--- a/packages/smooth_app/lib/background/operation_type.dart
+++ b/packages/smooth_app/lib/background/operation_type.dart
@@ -1,5 +1,6 @@
 import 'package:flutter_gen/gen_l10n/app_localizations.dart';
 import 'package:smooth_app/background/background_task.dart';
+import 'package:smooth_app/background/background_task_add_other_price.dart';
 import 'package:smooth_app/background/background_task_add_price.dart';
 import 'package:smooth_app/background/background_task_crop.dart';
 import 'package:smooth_app/background/background_task_details.dart';
@@ -37,6 +38,7 @@ enum OperationType {
   fullRefresh('F', 'FULL_REFRESH'),
   languageRefresh('L', 'LANGUAGE_REFRESH'),
   addPrice('A', 'ADD_PRICE'),
+  addOtherPrice('E', 'ADD_OTHER_PRICE'),
   details('D', 'PRODUCT_EDIT');
 
   const OperationType(this.header, this.processName);
@@ -70,6 +72,7 @@ enum OperationType {
   BackgroundTask fromJson(Map<String, dynamic> map) => switch (this) {
         crop => BackgroundTaskCrop.fromJson(map),
         addPrice => BackgroundTaskAddPrice.fromJson(map),
+        addOtherPrice => BackgroundTaskAddOtherPrice.fromJson(map),
         details => BackgroundTaskDetails.fromJson(map),
         hungerGames => BackgroundTaskHungerGames.fromJson(map),
         image => BackgroundTaskImage.fromJson(map),
@@ -89,6 +92,7 @@ enum OperationType {
         OperationType.details =>
           appLocalizations.background_task_operation_details,
         OperationType.addPrice => 'Add price',
+        OperationType.addOtherPrice => 'Add price to existing proof',
         OperationType.image => appLocalizations.background_task_operation_image,
         OperationType.unselect => 'Unselect a product image',
         OperationType.hungerGames => 'Answering to a Hunger Games question',
diff --git a/packages/smooth_app/lib/pages/locations/osm_location.dart b/packages/smooth_app/lib/pages/locations/osm_location.dart
index dd4742ed3ae..d66733e76c9 100644
--- a/packages/smooth_app/lib/pages/locations/osm_location.dart
+++ b/packages/smooth_app/lib/pages/locations/osm_location.dart
@@ -18,6 +18,20 @@ class OsmLocation {
     this.osmValue,
   });
 
+  OsmLocation.fromPrice(final Location location)
+      : osmId = location.osmId,
+        osmType = location.type,
+        longitude = location.longitude ?? 0,
+        latitude = location.latitude ?? 0,
+        name = location.name,
+        street = null,
+        city = location.city,
+        postcode = location.postcode,
+        country = location.country,
+        countryCode = location.countryCode,
+        osmKey = location.osmKey,
+        osmValue = location.osmValue;
+
   final int osmId;
   final LocationOSMType osmType;
   final double longitude;
diff --git a/packages/smooth_app/lib/pages/preferences/user_preferences_account.dart b/packages/smooth_app/lib/pages/preferences/user_preferences_account.dart
index 2418130f07d..32340b08fcd 100644
--- a/packages/smooth_app/lib/pages/preferences/user_preferences_account.dart
+++ b/packages/smooth_app/lib/pages/preferences/user_preferences_account.dart
@@ -272,7 +272,7 @@ class UserPreferencesAccount extends AbstractUserPreferences {
                 displayOwner: true,
                 displayProduct: true,
                 uri: OpenPricesAPIClient.getUri(
-                  path: 'app/prices',
+                  path: 'prices',
                   uriHelper: ProductQuery.uriPricesHelper,
                 ),
                 title: appLocalizations.all_search_prices_latest_title,
@@ -294,11 +294,11 @@ class UserPreferencesAccount extends AbstractUserPreferences {
       ),
       _getPriceListTile(
         appLocalizations.all_search_prices_top_location_title,
-        'app/locations',
+        'locations',
       ),
       _getPriceListTile(
         appLocalizations.all_search_prices_top_product_title,
-        'app/products',
+        'products',
       ),
       _buildProductQueryTile(
         productQuery: PagedToBeCompletedProductQuery(
diff --git a/packages/smooth_app/lib/pages/prices/get_prices_model.dart b/packages/smooth_app/lib/pages/prices/get_prices_model.dart
index 84b5333f4f7..765a3b8bba2 100644
--- a/packages/smooth_app/lib/pages/prices/get_prices_model.dart
+++ b/packages/smooth_app/lib/pages/prices/get_prices_model.dart
@@ -56,7 +56,7 @@ class GetPricesModel {
     final String barcode,
   ) =>
       OpenPricesAPIClient.getUri(
-        path: 'app/products/$barcode',
+        path: 'products/$barcode',
         uriHelper: ProductQuery.uriPricesHelper,
       );
 
diff --git a/packages/smooth_app/lib/pages/prices/price_currency_selector.dart b/packages/smooth_app/lib/pages/prices/price_currency_selector.dart
index f0941f22db1..77ca9ffafab 100644
--- a/packages/smooth_app/lib/pages/prices/price_currency_selector.dart
+++ b/packages/smooth_app/lib/pages/prices/price_currency_selector.dart
@@ -1,36 +1,38 @@
 import 'package:flutter/material.dart';
 import 'package:openfoodfacts/openfoodfacts.dart';
 import 'package:provider/provider.dart';
-import 'package:smooth_app/data_models/preferences/user_preferences.dart';
 import 'package:smooth_app/generic_lib/buttons/smooth_large_button_with_icon.dart';
 import 'package:smooth_app/pages/onboarding/currency_selector_helper.dart';
 import 'package:smooth_app/pages/prices/currency_extension.dart';
+import 'package:smooth_app/pages/prices/price_model.dart';
 
 /// Button that displays the currency for price adding.
 class PriceCurrencySelector extends StatelessWidget {
   PriceCurrencySelector();
 
-  final CurrencySelectorHelper helper = CurrencySelectorHelper();
+  final CurrencySelectorHelper _helper = CurrencySelectorHelper();
 
   @override
   Widget build(BuildContext context) {
-    // TODO(monsieurtanuki): use PriceModel for currency?
-    final UserPreferences userPreferences = context.watch<UserPreferences>();
-    final Currency selected = helper.getSelected(
-      userPreferences.userCurrencyCode,
-    );
+    final PriceModel model = context.watch<PriceModel>();
     return SmoothLargeButtonWithIcon(
-      onPressed: () async {
-        final Currency? currency = await helper.openCurrencySelector(
-          context: context,
-          selected: selected,
-        );
-        if (currency != null) {
-          await userPreferences.setUserCurrencyCode(currency.name);
-        }
-      },
-      text: selected.getFullName(),
-      icon: helper.currencyIconData,
+      onPressed: model.proof != null
+          ? null
+          : () async {
+              final Currency? currency = await _helper.openCurrencySelector(
+                context: context,
+                selected: model.currency,
+              );
+              if (currency == null) {
+                return;
+              }
+              if (!context.mounted) {
+                return;
+              }
+              model.currency = currency;
+            },
+      text: model.currency.getFullName(),
+      icon: _helper.currencyIconData,
     );
   }
 }
diff --git a/packages/smooth_app/lib/pages/prices/price_date_card.dart b/packages/smooth_app/lib/pages/prices/price_date_card.dart
index 7a48e3864c3..4acce28ac87 100644
--- a/packages/smooth_app/lib/pages/prices/price_date_card.dart
+++ b/packages/smooth_app/lib/pages/prices/price_date_card.dart
@@ -24,30 +24,33 @@ class PriceDateCard extends StatelessWidget {
           SmoothLargeButtonWithIcon(
             text: dateFormat.format(model.date),
             icon: Icons.calendar_month,
-            onPressed: () async {
-              final DateTime? newDate = await showDatePicker(
-                context: context,
-                locale: Locale(ProductQuery.getLanguage().offTag),
-                firstDate: model.firstDate,
-                lastDate: model.today,
-                builder: (final BuildContext context, final Widget? child) {
-                  // for some reason we don't have a fine display without that theme.
-                  // cf. https://stackoverflow.com/questions/50321182/how-to-customize-a-date-picker
-                  final ThemeData themeData =
-                      Theme.of(context).brightness == Brightness.light
-                          ? ThemeData.light()
-                          : ThemeData.dark();
-                  return Theme(
-                    data: themeData.copyWith(),
-                    child: child!,
-                  );
-                },
-              );
-              if (newDate == null) {
-                return;
-              }
-              model.date = newDate;
-            },
+            onPressed: model.proof != null
+                ? null
+                : () async {
+                    final DateTime? newDate = await showDatePicker(
+                      context: context,
+                      locale: Locale(ProductQuery.getLanguage().offTag),
+                      firstDate: model.firstDate,
+                      lastDate: model.today,
+                      builder:
+                          (final BuildContext context, final Widget? child) {
+                        // for some reason we don't have a fine display without that theme.
+                        // cf. https://stackoverflow.com/questions/50321182/how-to-customize-a-date-picker
+                        final ThemeData themeData =
+                            Theme.of(context).brightness == Brightness.light
+                                ? ThemeData.light()
+                                : ThemeData.dark();
+                        return Theme(
+                          data: themeData.copyWith(),
+                          child: child!,
+                        );
+                      },
+                    );
+                    if (newDate == null) {
+                      return;
+                    }
+                    model.date = newDate;
+                  },
           ),
         ],
       ),
diff --git a/packages/smooth_app/lib/pages/prices/price_location_card.dart b/packages/smooth_app/lib/pages/prices/price_location_card.dart
index ad34b1457d6..32b920fbba8 100644
--- a/packages/smooth_app/lib/pages/prices/price_location_card.dart
+++ b/packages/smooth_app/lib/pages/prices/price_location_card.dart
@@ -35,39 +35,42 @@ class PriceLocationCard extends StatelessWidget {
                     location.getSubtitle() ??
                     location.getLatLng().toString(),
             icon: location == null ? _iconTodo : _iconDone,
-            onPressed: () async {
-              final LocalDatabase localDatabase = context.read<LocalDatabase>();
-              final List<SearchLocationPreloadedItem> preloadedList =
-                  <SearchLocationPreloadedItem>[];
-              for (final OsmLocation osmLocation in model.locations) {
-                preloadedList.add(
-                  SearchLocationPreloadedItem(
-                    osmLocation,
-                    popFirst: false,
-                  ),
-                );
-              }
-              final OsmLocation? osmLocation =
-                  await Navigator.push<OsmLocation>(
-                context,
-                MaterialPageRoute<OsmLocation>(
-                  builder: (BuildContext context) => SearchPage(
-                    SearchLocationHelper(),
-                    preloadedList: preloadedList,
-                    autofocus: false,
-                  ),
-                ),
-              );
-              if (osmLocation == null) {
-                return;
-              }
-              final DaoOsmLocation daoOsmLocation =
-                  DaoOsmLocation(localDatabase);
-              await daoOsmLocation.put(osmLocation);
-              final List<OsmLocation> newOsmLocations =
-                  await daoOsmLocation.getAll();
-              model.locations = newOsmLocations;
-            },
+            onPressed: model.proof != null
+                ? null
+                : () async {
+                    final LocalDatabase localDatabase =
+                        context.read<LocalDatabase>();
+                    final List<SearchLocationPreloadedItem> preloadedList =
+                        <SearchLocationPreloadedItem>[];
+                    for (final OsmLocation osmLocation in model.locations!) {
+                      preloadedList.add(
+                        SearchLocationPreloadedItem(
+                          osmLocation,
+                          popFirst: false,
+                        ),
+                      );
+                    }
+                    final OsmLocation? osmLocation =
+                        await Navigator.push<OsmLocation>(
+                      context,
+                      MaterialPageRoute<OsmLocation>(
+                        builder: (BuildContext context) => SearchPage(
+                          SearchLocationHelper(),
+                          preloadedList: preloadedList,
+                          autofocus: false,
+                        ),
+                      ),
+                    );
+                    if (osmLocation == null) {
+                      return;
+                    }
+                    final DaoOsmLocation daoOsmLocation =
+                        DaoOsmLocation(localDatabase);
+                    await daoOsmLocation.put(osmLocation);
+                    final List<OsmLocation> newOsmLocations =
+                        await daoOsmLocation.getAll();
+                    model.locations = newOsmLocations;
+                  },
           ),
         ],
       ),
diff --git a/packages/smooth_app/lib/pages/prices/price_model.dart b/packages/smooth_app/lib/pages/prices/price_model.dart
index 4deeb56f153..24cf51a9fbc 100644
--- a/packages/smooth_app/lib/pages/prices/price_model.dart
+++ b/packages/smooth_app/lib/pages/prices/price_model.dart
@@ -1,12 +1,14 @@
+import 'dart:async';
+
 import 'package:flutter/material.dart';
 import 'package:flutter_gen/gen_l10n/app_localizations.dart';
 import 'package:openfoodfacts/openfoodfacts.dart';
 import 'package:provider/provider.dart';
+import 'package:smooth_app/background/background_task_add_other_price.dart';
 import 'package:smooth_app/background/background_task_add_price.dart';
 import 'package:smooth_app/data_models/preferences/user_preferences.dart';
 import 'package:smooth_app/pages/crop_parameters.dart';
 import 'package:smooth_app/pages/locations/osm_location.dart';
-import 'package:smooth_app/pages/onboarding/currency_selector_helper.dart';
 import 'package:smooth_app/pages/prices/price_amount_model.dart';
 import 'package:smooth_app/pages/prices/price_meta_product.dart';
 
@@ -14,15 +16,39 @@ import 'package:smooth_app/pages/prices/price_meta_product.dart';
 class PriceModel with ChangeNotifier {
   PriceModel({
     required final ProofType proofType,
-    required final List<OsmLocation> locations,
+    required final List<OsmLocation>? locations,
+    required final Currency currency,
     final PriceMetaProduct? initialProduct,
-  })  : _proofType = proofType,
+  })  : proof = null,
+        _proofType = proofType,
         _date = DateTime.now(),
+        _currency = currency,
         _locations = locations,
         priceAmountModels = <PriceAmountModel>[
           if (initialProduct != null) PriceAmountModel(product: initialProduct),
         ];
 
+  PriceModel.proof({
+    required Proof this.proof,
+  })  : _proofType = proof.type!,
+        _date = proof.date!,
+        _locations = null,
+        _currency = proof.currency!,
+        priceAmountModels = <PriceAmountModel>[];
+
+  /// Checks if a proof cannot be reused for prices adding.
+  ///
+  /// Sometimes we get partial data from the Prices server.
+  static bool isProofNotGoodEnough(final Proof proof) =>
+      proof.currency == null ||
+      proof.date == null ||
+      proof.type == null ||
+      proof.location == null ||
+      proof.locationOSMId == null ||
+      proof.locationOSMType == null ||
+      proof.imageThumbPath == null ||
+      proof.filePath == null;
+
   final List<PriceAmountModel> priceAmountModels;
 
   CropParameters? _cropParameters;
@@ -34,9 +60,11 @@ class PriceModel with ChangeNotifier {
     notifyListeners();
   }
 
+  final Proof? proof;
+
   ProofType _proofType;
 
-  ProofType get proofType => _proofType;
+  ProofType get proofType => proof != null ? proof!.type! : _proofType;
 
   set proofType(final ProofType proofType) {
     _proofType = proofType;
@@ -55,18 +83,27 @@ class PriceModel with ChangeNotifier {
   final DateTime today = DateTime.now();
   final DateTime firstDate = DateTime.utc(2020, 1, 1);
 
-  late List<OsmLocation> _locations;
+  List<OsmLocation>? _locations;
 
-  List<OsmLocation> get locations => _locations;
+  List<OsmLocation>? get locations => _locations;
 
-  set locations(final List<OsmLocation> locations) {
+  set locations(final List<OsmLocation>? locations) {
     _locations = locations;
     notifyListeners();
   }
 
-  OsmLocation? get location => _locations.firstOrNull;
+  OsmLocation? get location => proof != null
+      ? OsmLocation.fromPrice(proof!.location!)
+      : _locations!.firstOrNull;
+
+  Currency _currency;
 
-  late Currency _checkedCurrency;
+  Currency get currency => _currency;
+
+  set currency(final Currency currency) {
+    _currency = currency;
+    notifyListeners();
+  }
 
   // overriding in order to make it public
   @override
@@ -75,14 +112,15 @@ class PriceModel with ChangeNotifier {
   /// Returns the error message of the parameter check, or null if OK.
   String? checkParameters(final BuildContext context) {
     final AppLocalizations appLocalizations = AppLocalizations.of(context);
-    if (cropParameters == null) {
-      return appLocalizations.prices_proof_mandatory;
+    if (proof == null) {
+      if (cropParameters == null) {
+        return appLocalizations.prices_proof_mandatory;
+      }
+      if (location == null) {
+        return appLocalizations.prices_location_mandatory;
+      }
     }
 
-    final UserPreferences userPreferences = context.read<UserPreferences>();
-    _checkedCurrency =
-        CurrencySelectorHelper().getSelected(userPreferences.userCurrencyCode);
-
     for (final PriceAmountModel priceAmountModel in priceAmountModels) {
       final String? checkParameters = priceAmountModel.checkParameters(context);
       if (checkParameters != null) {
@@ -90,9 +128,8 @@ class PriceModel with ChangeNotifier {
       }
     }
 
-    if (location == null) {
-      return appLocalizations.prices_location_mandatory;
-    }
+    final UserPreferences userPreferences = context.read<UserPreferences>();
+    unawaited(userPreferences.setUserCurrencyCode(currency.name));
 
     return null;
   }
@@ -109,15 +146,32 @@ class PriceModel with ChangeNotifier {
       prices.add(priceAmountModel.checkedPaidPrice);
       pricesWithoutDiscount.add(priceAmountModel.checkedPriceWithoutDiscount);
     }
+    if (proof != null) {
+      return BackgroundTaskAddOtherPrice.addTask(
+        context: context,
+        // per receipt
+        locationOSMId: proof!.locationOSMId!,
+        locationOSMType: proof!.locationOSMType!,
+        date: proof!.date!,
+        currency: proof!.currency!,
+        proofId: proof!.id,
+        // per item
+        barcodes: barcodes,
+        pricesAreDiscounted: pricesAreDiscounted,
+        prices: prices,
+        pricesWithoutDiscount: pricesWithoutDiscount,
+      );
+    }
     return BackgroundTaskAddPrice.addTask(
       context: context,
-      // per receipt
+      // proof display
       cropObject: cropParameters!,
+      // per receipt
       locationOSMId: location!.osmId,
       locationOSMType: location!.osmType,
       date: date,
       proofType: proofType,
-      currency: _checkedCurrency,
+      currency: currency,
       // per item
       barcodes: barcodes,
       pricesAreDiscounted: pricesAreDiscounted,
diff --git a/packages/smooth_app/lib/pages/prices/price_product_widget.dart b/packages/smooth_app/lib/pages/prices/price_product_widget.dart
index 776b9445cc0..ef898f5ccd4 100644
--- a/packages/smooth_app/lib/pages/prices/price_product_widget.dart
+++ b/packages/smooth_app/lib/pages/prices/price_product_widget.dart
@@ -26,7 +26,7 @@ class PriceProductWidget extends StatelessWidget {
     final String name = priceProduct.name ?? priceProduct.code;
     final bool unknown = priceProduct.name == null;
     final String? imageURL = priceProduct.imageURL;
-    final int priceCount = priceProduct.priceCount;
+    final int priceCount = priceProduct.priceCount ?? 0;
     final List<String>? brands =
         priceProduct.brands == '' ? null : priceProduct.brands?.split(',');
     final String? quantity = priceProduct.quantity == null
diff --git a/packages/smooth_app/lib/pages/prices/price_proof_card.dart b/packages/smooth_app/lib/pages/prices/price_proof_card.dart
index d972ae2932a..091d595d189 100644
--- a/packages/smooth_app/lib/pages/prices/price_proof_card.dart
+++ b/packages/smooth_app/lib/pages/prices/price_proof_card.dart
@@ -11,6 +11,7 @@ import 'package:smooth_app/pages/crop_parameters.dart';
 import 'package:smooth_app/pages/image_crop_page.dart';
 import 'package:smooth_app/pages/prices/price_model.dart';
 import 'package:smooth_app/pages/proof_crop_helper.dart';
+import 'package:smooth_app/query/product_query.dart';
 
 /// Card that displays the proof for price adding.
 class PriceProofCard extends StatelessWidget {
@@ -27,6 +28,20 @@ class PriceProofCard extends StatelessWidget {
       child: Column(
         children: <Widget>[
           Text(appLocalizations.prices_proof_subtitle),
+          if (model.proof != null)
+            LayoutBuilder(
+              builder: (BuildContext context, BoxConstraints constraints) =>
+                  Image(
+                image: NetworkImage(
+                  model.proof!
+                      .getFileUrl(
+                        uriProductHelper: ProductQuery.uriPricesHelper,
+                        isThumbnail: true,
+                      )!
+                      .toString(),
+                ),
+              ),
+            ),
           if (model.cropParameters != null)
             LayoutBuilder(
               builder: (BuildContext context, BoxConstraints constraints) =>
@@ -40,23 +55,27 @@ class PriceProofCard extends StatelessWidget {
             ),
           //Text(model.cropParameters!.smallCroppedFile.path),
           SmoothLargeButtonWithIcon(
-            text: model.cropParameters == null
+            text: model.proof == null && model.cropParameters == null
                 ? appLocalizations.prices_proof_find
                 : model.proofType == ProofType.receipt
                     ? appLocalizations.prices_proof_receipt
                     : appLocalizations.prices_proof_price_tag,
-            icon: model.cropParameters == null ? _iconTodo : _iconDone,
-            onPressed: () async {
-              final CropParameters? cropParameters =
-                  await confirmAndUploadNewImage(
-                context,
-                cropHelper: ProofCropHelper(model: model),
-                isLoggedInMandatory: true,
-              );
-              if (cropParameters != null) {
-                model.cropParameters = cropParameters;
-              }
-            },
+            icon: model.proof == null && model.cropParameters == null
+                ? _iconTodo
+                : _iconDone,
+            onPressed: model.proof != null
+                ? null
+                : () async {
+                    final CropParameters? cropParameters =
+                        await confirmAndUploadNewImage(
+                      context,
+                      cropHelper: ProofCropHelper(model: model),
+                      isLoggedInMandatory: true,
+                    );
+                    if (cropParameters != null) {
+                      model.cropParameters = cropParameters;
+                    }
+                  },
           ),
           LayoutBuilder(
             builder: (BuildContext context, BoxConstraints constraints) => Row(
@@ -67,8 +86,10 @@ class PriceProofCard extends StatelessWidget {
                     title: Text(appLocalizations.prices_proof_receipt),
                     value: ProofType.receipt,
                     groupValue: model.proofType,
-                    onChanged: (final ProofType? proofType) =>
-                        model.proofType = proofType!,
+                    onChanged: model.proof != null
+                        ? null
+                        : (final ProofType? proofType) =>
+                            model.proofType = proofType!,
                   ),
                 ),
                 SizedBox(
@@ -77,8 +98,10 @@ class PriceProofCard extends StatelessWidget {
                     title: Text(appLocalizations.prices_proof_price_tag),
                     value: ProofType.priceTag,
                     groupValue: model.proofType,
-                    onChanged: (final ProofType? proofType) =>
-                        model.proofType = proofType!,
+                    onChanged: model.proof != null
+                        ? null
+                        : (final ProofType? proofType) =>
+                            model.proofType = proofType!,
                   ),
                 ),
               ],
diff --git a/packages/smooth_app/lib/pages/prices/price_proof_page.dart b/packages/smooth_app/lib/pages/prices/price_proof_page.dart
index 84a8eea48e9..7077340dc7c 100644
--- a/packages/smooth_app/lib/pages/prices/price_proof_page.dart
+++ b/packages/smooth_app/lib/pages/prices/price_proof_page.dart
@@ -3,6 +3,9 @@ import 'package:flutter_gen/gen_l10n/app_localizations.dart';
 import 'package:intl/intl.dart';
 import 'package:openfoodfacts/openfoodfacts.dart';
 import 'package:smooth_app/helpers/launch_url_helper.dart';
+import 'package:smooth_app/pages/prices/price_model.dart';
+import 'package:smooth_app/pages/prices/product_price_add_page.dart';
+import 'package:smooth_app/pages/product/common/product_refresher.dart';
 import 'package:smooth_app/query/product_query.dart';
 import 'package:smooth_app/widgets/smooth_app_bar.dart';
 import 'package:smooth_app/widgets/smooth_scaffold.dart';
@@ -21,6 +24,30 @@ class PriceProofPage extends StatelessWidget {
     final DateFormat dateFormat =
         DateFormat.yMd(ProductQuery.getLocaleString()).add_Hms();
     return SmoothScaffold(
+      floatingActionButton: PriceModel.isProofNotGoodEnough(proof)
+          ? null
+          : FloatingActionButton.extended(
+              label: Text(appLocalizations.prices_add_a_price),
+              icon: const Icon(Icons.add),
+              onPressed: () async {
+                if (!await ProductRefresher().checkIfLoggedIn(
+                  context,
+                  isLoggedInMandatory: true,
+                )) {
+                  return;
+                }
+                if (!context.mounted) {
+                  return;
+                }
+                await Navigator.of(context).push(
+                  MaterialPageRoute<void>(
+                    builder: (BuildContext context) => ProductPriceAddPage(
+                      PriceModel.proof(proof: proof),
+                    ),
+                  ),
+                );
+              },
+            ),
       appBar: SmoothAppBar(
         title: Text(appLocalizations.user_search_proof_title),
         subTitle: Text(dateFormat.format(proof.created)),
@@ -28,18 +55,39 @@ class PriceProofPage extends StatelessWidget {
           IconButton(
             tooltip: appLocalizations.prices_app_button,
             icon: const Icon(Icons.open_in_new),
-            onPressed: () async => LaunchUrlHelper.launchURL(_getUrl()),
+            onPressed: () async => LaunchUrlHelper.launchURL(_getUrl(true)),
           ),
         ],
       ),
-      body: Image(
-        image: NetworkImage(_getUrl()),
-        fit: BoxFit.cover,
+      body: Center(
+        child: Image.network(
+          _getUrl(false),
+          fit: BoxFit.cover,
+          loadingBuilder: (BuildContext context, Widget child,
+              ImageChunkEvent? loadingProgress) {
+            if (loadingProgress == null) {
+              return child;
+            }
+            return Center(
+              child: SizedBox(
+                width: double.maxFinite,
+                height: double.maxFinite,
+                child: Image.network(
+                  _getUrl(true),
+                  fit: BoxFit.contain,
+                ),
+              ),
+            );
+          },
+        ),
       ),
     );
   }
 
-  String _getUrl() => proof
-      .getFileUrl(uriProductHelper: ProductQuery.uriPricesHelper)
+  String _getUrl(final bool isThumbnail) => proof
+      .getFileUrl(
+        uriProductHelper: ProductQuery.uriPricesHelper,
+        isThumbnail: isThumbnail,
+      )
       .toString();
 }
diff --git a/packages/smooth_app/lib/pages/prices/price_user_button.dart b/packages/smooth_app/lib/pages/prices/price_user_button.dart
index c9521ab4fc2..070af93e861 100644
--- a/packages/smooth_app/lib/pages/prices/price_user_button.dart
+++ b/packages/smooth_app/lib/pages/prices/price_user_button.dart
@@ -41,7 +41,7 @@ class PriceUserButton extends StatelessWidget {
               displayOwner: false,
               displayProduct: true,
               uri: OpenPricesAPIClient.getUri(
-                path: 'app/users/$user',
+                path: 'users/$user',
                 uriHelper: ProductQuery.uriPricesHelper,
               ),
               title: showUserTitle(user: user, context: context),
diff --git a/packages/smooth_app/lib/pages/prices/prices_proofs_page.dart b/packages/smooth_app/lib/pages/prices/prices_proofs_page.dart
index d1a8d842f7d..baa2cf2ddbb 100644
--- a/packages/smooth_app/lib/pages/prices/prices_proofs_page.dart
+++ b/packages/smooth_app/lib/pages/prices/prices_proofs_page.dart
@@ -46,7 +46,7 @@ class _PricesProofsPageState extends State<PricesProofsPage>
             icon: const Icon(Icons.open_in_new),
             onPressed: () async => LaunchUrlHelper.launchURL(
               OpenPricesAPIClient.getUri(
-                path: 'app/dashboard/proofs',
+                path: 'dashboard/proofs',
                 uriHelper: ProductQuery.uriPricesHelper,
               ).toString(),
             ),
@@ -204,6 +204,7 @@ class _PriceProofImage extends StatelessWidget {
             proof
                 .getFileUrl(
                   uriProductHelper: ProductQuery.uriPricesHelper,
+                  isThumbnail: true,
                 )
                 .toString(),
           ),
diff --git a/packages/smooth_app/lib/pages/prices/prices_users_page.dart b/packages/smooth_app/lib/pages/prices/prices_users_page.dart
index 6e0b801c37d..f430bae6d40 100644
--- a/packages/smooth_app/lib/pages/prices/prices_users_page.dart
+++ b/packages/smooth_app/lib/pages/prices/prices_users_page.dart
@@ -45,7 +45,7 @@ class _PricesUsersPageState extends State<PricesUsersPage>
             icon: const Icon(Icons.open_in_new),
             onPressed: () async => LaunchUrlHelper.launchURL(
               OpenPricesAPIClient.getUri(
-                path: 'app/users',
+                path: 'users',
                 uriHelper: ProductQuery.uriPricesHelper,
               ).toString(),
             ),
@@ -79,6 +79,7 @@ class _PricesUsersPageState extends State<PricesUsersPage>
           final List<Widget> children = <Widget>[];
 
           for (final PriceUser item in result.items!) {
+            final int priceCount = item.priceCount ?? 0;
             children.add(
               SmoothCard(
                 child: Wrap(
@@ -91,13 +92,13 @@ class _PricesUsersPageState extends State<PricesUsersPage>
                         context: context,
                       ),
                       iconData: Icons.label,
-                      title: '${item.priceCount}',
+                      title: '$priceCount',
                       buttonStyle: ElevatedButton.styleFrom(
                         foregroundColor: PriceCountWidget.getForegroundColor(
-                          item.priceCount,
+                          priceCount,
                         ),
                         backgroundColor: PriceCountWidget.getBackgroundColor(
-                          item.priceCount,
+                          priceCount,
                         ),
                       ),
                     ),
diff --git a/packages/smooth_app/lib/pages/prices/product_price_add_page.dart b/packages/smooth_app/lib/pages/prices/product_price_add_page.dart
index 9276299c707..13d71fac9fc 100644
--- a/packages/smooth_app/lib/pages/prices/product_price_add_page.dart
+++ b/packages/smooth_app/lib/pages/prices/product_price_add_page.dart
@@ -10,6 +10,7 @@ import 'package:smooth_app/generic_lib/design_constants.dart';
 import 'package:smooth_app/generic_lib/dialogs/smooth_alert_dialog.dart';
 import 'package:smooth_app/generic_lib/widgets/smooth_back_button.dart';
 import 'package:smooth_app/pages/locations/osm_location.dart';
+import 'package:smooth_app/pages/onboarding/currency_selector_helper.dart';
 import 'package:smooth_app/pages/prices/price_add_product_card.dart';
 import 'package:smooth_app/pages/prices/price_amount_card.dart';
 import 'package:smooth_app/pages/prices/price_currency_card.dart';
@@ -24,15 +25,11 @@ import 'package:smooth_app/widgets/smooth_scaffold.dart';
 
 /// Single page that displays all the elements of price adding.
 class ProductPriceAddPage extends StatefulWidget {
-  const ProductPriceAddPage({
-    required this.product,
-    required this.latestOsmLocations,
-    required this.proofType,
-  });
+  const ProductPriceAddPage(
+    this.model,
+  );
 
-  final PriceMetaProduct? product;
-  final List<OsmLocation> latestOsmLocations;
-  final ProofType proofType;
+  final PriceModel model;
 
   static Future<void> showProductPage({
     required final BuildContext context,
@@ -55,12 +52,20 @@ class ProductPriceAddPage extends StatefulWidget {
       return;
     }
 
+    final UserPreferences userPreferences = context.read<UserPreferences>();
+    final Currency currency = CurrencySelectorHelper().getSelected(
+      userPreferences.userCurrencyCode,
+    );
+
     await Navigator.of(context).push(
       MaterialPageRoute<void>(
         builder: (BuildContext context) => ProductPriceAddPage(
-          product: product,
-          latestOsmLocations: osmLocations,
-          proofType: proofType,
+          PriceModel(
+            proofType: proofType,
+            locations: osmLocations,
+            initialProduct: product,
+            currency: currency,
+          ),
         ),
       ),
     );
@@ -72,19 +77,13 @@ class ProductPriceAddPage extends StatefulWidget {
 
 class _ProductPriceAddPageState extends State<ProductPriceAddPage>
     with TraceableClientMixin {
-  late final PriceModel _model = PriceModel(
-    proofType: widget.proofType,
-    locations: widget.latestOsmLocations,
-    initialProduct: widget.product,
-  );
-
   final GlobalKey<FormState> _formKey = GlobalKey<FormState>();
 
   @override
   Widget build(BuildContext context) {
     // TODO(monsieurtanuki): add WillPopScope2
     return ChangeNotifierProvider<PriceModel>.value(
-      value: _model,
+      value: widget.model,
       builder: (
         final BuildContext context,
         final Widget? child,
@@ -231,5 +230,6 @@ class _ProductPriceAddPageState extends State<ProductPriceAddPage>
   }
 
   @override
-  String get actionName => 'Opened price_page with ${widget.proofType.offTag}';
+  String get actionName =>
+      'Opened price_page with ${widget.model.proofType.offTag}';
 }
diff --git a/packages/smooth_app/pubspec.lock b/packages/smooth_app/pubspec.lock
index 4eb9b6dc02b..7218afe031f 100644
--- a/packages/smooth_app/pubspec.lock
+++ b/packages/smooth_app/pubspec.lock
@@ -253,22 +253,6 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "1.3.0"
-  checked_yaml:
-    dependency: transitive
-    description:
-      name: checked_yaml
-      sha256: feb6bed21949061731a7a75fc5d2aa727cf160b91af9a3e464c5e3a32e28b5ff
-      url: "https://pub.dev"
-    source: hosted
-    version: "2.0.3"
-  cli_util:
-    dependency: transitive
-    description:
-      name: cli_util
-      sha256: c05b7406fdabc7a49a3929d4af76bcaccbbffcbcdcf185b082e1ae07da323d19
-      url: "https://pub.dev"
-    source: hosted
-    version: "0.4.1"
   clock:
     dependency: transitive
     description:
@@ -623,14 +607,6 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "0.1.4+1"
-  flutter_launcher_icons:
-    dependency: "direct dev"
-    description:
-      name: flutter_launcher_icons
-      sha256: "526faf84284b86a4cb36d20a5e45147747b7563d921373d4ee0559c54fcdbcea"
-      url: "https://pub.dev"
-    source: hosted
-    version: "0.13.1"
   flutter_lints:
     dependency: "direct dev"
     description:
@@ -775,10 +751,10 @@ packages:
     dependency: "direct main"
     description:
       name: go_router
-      sha256: "5cf5fdcf853b0629deb35891c7af643be900c3dcaed7489009f9e7dbcfe55ab6"
+      sha256: "6f1b756f6e863259a99135ff3c95026c3cdca17d10ebef2bba2261a25ddc8bbc"
       url: "https://pub.dev"
     source: hosted
-    version: "14.2.8"
+    version: "14.3.0"
   graphs:
     dependency: transitive
     description:
@@ -1100,10 +1076,10 @@ packages:
     dependency: "direct main"
     description:
       name: openfoodfacts
-      sha256: "9ae8bfaed74c0e59bfe2cd217e2ad805d2d52710ec563861ea728176b8cd419f"
+      sha256: d35a213d6354246e3b27e0b18fe3def658e00c337346cf11c4f8ba082f92dfaa
       url: "https://pub.dev"
     source: hosted
-    version: "3.15.0"
+    version: "3.16.0"
   openfoodfacts_flutter_lints:
     dependency: "direct dev"
     description:
diff --git a/packages/smooth_app/pubspec.yaml b/packages/smooth_app/pubspec.yaml
index 81f2d9e9267..6580a2790c1 100644
--- a/packages/smooth_app/pubspec.yaml
+++ b/packages/smooth_app/pubspec.yaml
@@ -13,7 +13,7 @@ dependencies:
     sdk: flutter
 
   async: 2.11.0
-  go_router: 14.2.8
+  go_router: 14.3.0
   barcode_widget: 2.0.4
   carousel_slider: 5.0.0
   cupertino_icons: 1.0.8
@@ -99,7 +99,7 @@ dependencies:
     path: ../scanner/zxing
 
 
-  openfoodfacts: 3.15.0
+  openfoodfacts: 3.16.0
   # openfoodfacts:
   #   path: ../../../openfoodfacts-dart
 
@@ -108,7 +108,6 @@ dev_dependencies:
     sdk: flutter
   flutter_driver:
     sdk: flutter
-  flutter_launcher_icons: 0.13.1
   flutter_test:
     sdk: flutter
   mockito: 5.4.4
@@ -118,18 +117,6 @@ dev_dependencies:
   openfoodfacts_flutter_lints:
     git: https://github.com/openfoodfacts/openfoodfacts_flutter_lints.git
 
-# 'flutter pub run flutter_launcher_icons:main' to update
-flutter_icons:
-  android: "launcher_icon"
-  ios: true
-  remove_alpha_ios: true
-  image_path: "assets/app/release_icon_transparent_1152x1152.png"
-  adaptive_icon_background: "#FFFFFF"
-  # Only the inner 72x72dp of the 108x108dp adaptive icon is shown
-  # (extra padding of 18dp on all sides is used for visual effects)
-  # https://developer.android.com/guide/practices/ui_guidelines/icon_design_adaptive
-  adaptive_icon_foreground: "assets/app/release_icon_transparent_70pct_1152x1152.png"
-
 # 'flutter pub run flutter_native_splash:create' to update
 flutter_native_splash:
   color: "#FFFFFF"