diff --git a/app/src/main/java/com/usharik/seznamslovnik/MainActivity.java b/app/src/main/java/com/usharik/seznamslovnik/MainActivity.java
index f074880..56ef899 100755
--- a/app/src/main/java/com/usharik/seznamslovnik/MainActivity.java
+++ b/app/src/main/java/com/usharik/seznamslovnik/MainActivity.java
@@ -78,6 +78,8 @@ protected void onPause() {
     public boolean onCreateOptionsMenu(Menu menu) {
         MenuInflater inflater = getMenuInflater();
         inflater.inflate(R.menu.options, menu);
+        MenuItem item = menu.findItem(R.id.offlineMode);
+        item.setChecked(getViewModel().isOfflineMode());
         return true;
     }
 
@@ -85,7 +87,7 @@ public boolean onCreateOptionsMenu(Menu menu) {
     public boolean onOptionsItemSelected(MenuItem item){
         switch(item.getItemId()) {
             case R.id.offlineMode:
-                item.setChecked(!item.isChecked());
+                item.setChecked(!getViewModel().isOfflineMode());
                 getViewModel().setOfflineMode(item.isChecked());
                 updateTitle();
                 return true;
diff --git a/app/src/main/java/com/usharik/seznamslovnik/MainViewModel.java b/app/src/main/java/com/usharik/seznamslovnik/MainViewModel.java
index 309aeb9..999c348 100755
--- a/app/src/main/java/com/usharik/seznamslovnik/MainViewModel.java
+++ b/app/src/main/java/com/usharik/seznamslovnik/MainViewModel.java
@@ -1,6 +1,7 @@
 package com.usharik.seznamslovnik;
 
 import android.content.ClipboardManager;
+import android.content.SharedPreferences;
 import android.content.res.Resources;
 import android.databinding.Bindable;
 import android.os.Vibrator;
@@ -39,6 +40,8 @@
 
 public class MainViewModel extends ViewModelObservable {
 
+    private static final String OFFLINE_MODE_PREF_KEY = "isOffline";
+
     private final AppState appState;
     private final Retrofit retrofit;
     private final TranslationService translationService;
@@ -47,6 +50,7 @@ public class MainViewModel extends ViewModelObservable {
     private final Resources resources;
     private final ClipboardManager clipboardManager;
     private final Vibrator vibrator;
+    private final SharedPreferences sharedPreferences;
 
     private String text;
     private String word;
@@ -65,7 +69,8 @@ public MainViewModel(final AppState appState,
                          final PublishSubject<Action> executeActionSubject,
                          final Resources resources,
                          final ClipboardManager clipboardManager,
-                         final Vibrator vibrator) {
+                         final Vibrator vibrator,
+                         final SharedPreferences sharedPreferences) {
         this.appState = appState;
         this.retrofit = retrofit;
         this.translationService = translationService;
@@ -74,8 +79,10 @@ public MainViewModel(final AppState appState,
         this.resources = resources;
         this.clipboardManager = clipboardManager;
         this.vibrator = vibrator;
+        this.sharedPreferences = sharedPreferences;
         this.adapter = getEmptyAdapter();
         this.scrollPosition = 0;
+        this.appState.isOfflineMode = this.sharedPreferences.getBoolean(OFFLINE_MODE_PREF_KEY, false);
     }
 
     @Bindable
@@ -220,4 +227,12 @@ private MyAdapter getEmptyAdapter() {
         String langTo = LANG_ORDER_STR[toLanguageIx];
         return new MyAdapter(Collections.EMPTY_LIST, translationService, clipboardManager, vibrator, executeActionSubject, resources, langFrom, langTo);
     }
+
+    @Override
+    public void onCleared() {
+        super.onCleared();
+        SharedPreferences.Editor edit = sharedPreferences.edit();
+        edit.putBoolean(OFFLINE_MODE_PREF_KEY, appState.isOfflineMode);
+        edit.apply();
+    }
 }
\ No newline at end of file
diff --git a/app/src/main/java/com/usharik/seznamslovnik/di/ServiceModule.java b/app/src/main/java/com/usharik/seznamslovnik/di/ServiceModule.java
index 8cb2d5c..1c360ee 100755
--- a/app/src/main/java/com/usharik/seznamslovnik/di/ServiceModule.java
+++ b/app/src/main/java/com/usharik/seznamslovnik/di/ServiceModule.java
@@ -3,6 +3,7 @@
 import android.app.Application;
 import android.content.ClipboardManager;
 import android.content.Context;
+import android.content.SharedPreferences;
 import android.content.res.Resources;
 import android.os.Vibrator;
 
@@ -86,4 +87,10 @@ Vibrator provideVibrator(Application application) {
     Resources provideResources(Application application) {
         return application.getResources();
     }
+
+    @Provides
+    @Singleton
+    SharedPreferences provideSharedPrefences(Application application) {
+        return application.getSharedPreferences("seznam_slovnik.prefences", Context.MODE_PRIVATE);
+    }
 }