diff --git a/packages/smooth_app/assets/animations/off b/packages/smooth_app/assets/animations/off
deleted file mode 100644
index 969af53419c..00000000000
Binary files a/packages/smooth_app/assets/animations/off and /dev/null differ
diff --git a/packages/smooth_app/lib/smooth_category_picker_example.dart b/packages/smooth_app/lib/smooth_category_picker_example.dart
deleted file mode 100644
index 86263096ff9..00000000000
--- a/packages/smooth_app/lib/smooth_category_picker_example.dart
+++ /dev/null
@@ -1,222 +0,0 @@
-// @dart = 2.12
-
-import 'package:flutter/material.dart';
-import 'package:flutter/scheduler.dart';
-import 'package:openfoodfacts/openfoodfacts.dart';
-import 'package:smooth_app/generic_lib/dialogs/smooth_alert_dialog.dart';
-import 'package:smooth_app/generic_lib/dialogs/smooth_category_picker.dart';
-import 'package:smooth_app/widgets/smooth_scaffold.dart';
-
-void main() {
-  timeDilation = 1.0;
-  runApp(
-    const MaterialApp(
-      debugShowCheckedModeBanner: false,
-      home: SafeArea(
-        child: ExampleApp(),
-      ),
-    ),
-  );
-}
-
-class Fruit implements Comparable<Fruit> {
-  const Fruit(this.name);
-  final String name;
-
-  @override
-  int compareTo(Fruit other) => name.compareTo(other.name);
-
-  @override
-  String toString() => name;
-}
-
-class FruitCategory extends SmoothCategory<Fruit> {
-  FruitCategory(Fruit value, [Iterable<FruitCategory>? children])
-      : children = children?.toSet() ?? <FruitCategory>{},
-        super(value);
-
-  Set<FruitCategory> children;
-
-  @override
-  void addChild(FruitCategory newChild) => children.add(newChild);
-
-  @override
-  Future<FruitCategory?> getChild(Fruit childValue) async {
-    return await super.getChild(childValue) as FruitCategory?;
-  }
-
-  @override
-  String getLabel(OpenFoodFactsLanguage language) => value.name;
-
-  @override
-  Stream<SmoothCategory<Fruit>> getChildren() async* {
-    for (final SmoothCategory<Fruit> child in children) {
-      yield child;
-    }
-  }
-
-  @override
-  Stream<SmoothCategory<Fruit>> getParents() async* {}
-}
-
-FruitCategory categories = FruitCategory(
-  const Fruit('fruit'),
-  <FruitCategory>{
-    FruitCategory(
-      const Fruit('apple'),
-      <FruitCategory>{
-        FruitCategory(
-          const Fruit('red'),
-          <FruitCategory>[
-            FruitCategory(const Fruit('Red Delicious')),
-            FruitCategory(const Fruit('Fuji')),
-            FruitCategory(const Fruit('Crispin')),
-            FruitCategory(const Fruit('Pink Lady')),
-          ],
-        ),
-        FruitCategory(
-          const Fruit('yellow'),
-          <FruitCategory>[
-            FruitCategory(const Fruit('Yellow Delicious')),
-            FruitCategory(const Fruit('Ginger Gold')),
-          ],
-        ),
-        FruitCategory(
-          const Fruit('green'),
-          <FruitCategory>[
-            FruitCategory(const Fruit('Granny Smith')),
-          ],
-        ),
-      },
-    ),
-    FruitCategory(
-      const Fruit('berry'),
-      <FruitCategory>{
-        FruitCategory(const Fruit('blueberry')),
-        FruitCategory(const Fruit('raspberry')),
-      },
-    ),
-  },
-);
-
-Future<FruitCategory?> getCategory(Iterable<Fruit> path) async {
-  if (path.isEmpty) {
-    return null;
-  }
-  FruitCategory? result = categories.value == path.first ? categories : null;
-  final List<Fruit> followPath = path.skip(1).toList();
-  while (result != null && followPath.isNotEmpty) {
-    result = await result.getChild(followPath.first);
-    followPath.removeAt(0);
-  }
-  return result;
-}
-
-class ExampleApp extends StatefulWidget {
-  const ExampleApp();
-
-  @override
-  State<ExampleApp> createState() => _ExampleAppState();
-}
-
-class _ExampleAppState extends State<ExampleApp> {
-  Set<Fruit> currentCategories = <Fruit>{
-    const Fruit('raspberry'),
-    const Fruit('Fuji')
-  };
-  List<Fruit> currentCategoryPath = <Fruit>[
-    const Fruit('fruit'),
-    const Fruit('apple'),
-  ];
-
-  Widget _addCategoryDialog(BuildContext context, FruitCategory parent) {
-    final TextEditingController controller = TextEditingController();
-    void addCategory(String name) {
-      Navigator.of(context)
-          .pop(name.isNotEmpty ? FruitCategory(Fruit(name)) : null);
-    }
-
-    return SmoothAlertDialog(
-      body: TextField(
-        autofocus: true,
-        controller: controller,
-        decoration: const InputDecoration(
-          hintText: 'Enter new category name',
-        ),
-        onSubmitted: addCategory,
-      ),
-      positiveAction: SmoothActionButton(
-        text: 'OK',
-        onPressed: () => addCategory(controller.text),
-      ),
-      negativeAction: SmoothActionButton(
-        text: 'Cancel',
-        onPressed: () => Navigator.of(context).pop(),
-      ),
-    );
-  }
-
-  @override
-  Widget build(BuildContext context) {
-    return Theme(
-      data: Theme.of(context).copyWith(
-        canvasColor: Colors.lightGreenAccent,
-        scaffoldBackgroundColor: Colors.lightGreenAccent,
-        floatingActionButtonTheme: const FloatingActionButtonThemeData(
-          backgroundColor: Colors.green,
-          foregroundColor: Colors.black,
-        ),
-        checkboxTheme: CheckboxTheme.of(context).copyWith(
-          fillColor: WidgetStateColor.resolveWith((Set<WidgetState> states) {
-            if (states.contains(WidgetState.selected)) {
-              return Colors.green;
-            }
-            return Colors.black38;
-          }),
-        ),
-        chipTheme:
-            ChipTheme.of(context).copyWith(backgroundColor: Colors.green),
-      ),
-      child: SmoothScaffold(
-        body: SmoothCategoryPicker<Fruit>(
-          categoryFinder: getCategory,
-          currentPath: currentCategoryPath,
-          currentCategories: currentCategories,
-          onCategoriesChanged: (Set<Fruit> value) {
-            setState(() {
-              currentCategories = value;
-            });
-          },
-          onPathChanged: (Iterable<Fruit> path) {
-            setState(() {
-              currentCategoryPath = path.toList();
-            });
-          },
-          onAddCategory: (Iterable<Fruit> path) {
-            getCategory(path).then((FruitCategory? currentCategory) {
-              if (currentCategory != null) {
-                showDialog<FruitCategory>(
-                        builder: (BuildContext context) =>
-                            _addCategoryDialog(context, currentCategory),
-                        context: context)
-                    .then<void>((FruitCategory? category) {
-                  if (category != null) {
-                    setState(() {
-                      // Remove the parent from the set of assigned categories,
-                      // since it isn't a leaf anymore.
-                      currentCategories.remove(currentCategory.value);
-                      currentCategory.addChild(category);
-                      // If they added a new category, they must mean that the
-                      // category applies.
-                      currentCategories.add(category.value);
-                    });
-                  }
-                });
-              }
-            });
-          },
-        ),
-      ),
-    );
-  }
-}