diff --git a/assets/group1.json b/assets/group1.json
index eadf04c..4e2de76 100644
--- a/assets/group1.json
+++ b/assets/group1.json
@@ -1,5 +1,5 @@
 {
-  "group": "Gruppe 1",
+  "group": 1,
   "HITT_time": 35,
   "relapse_categories": ["App stresst mich", "langeweile", "lunge braucht es"],
   "mood_query": {
diff --git a/assets/group3.json b/assets/group3.json
index 6e1d75c..623ffc8 100644
--- a/assets/group3.json
+++ b/assets/group3.json
@@ -1,5 +1,5 @@
 {
-  "group": "Gruppe 3",
+  "group": 3,
   "HITT_time": 35,
   "chess_time": {
     "hours": 8,
diff --git a/lib/models/settings.dart b/lib/models/settings.dart
index 359338f..6691e91 100644
--- a/lib/models/settings.dart
+++ b/lib/models/settings.dart
@@ -1,7 +1,7 @@
 import 'package:smoke_cess_app/service/json_service.dart';
 
 class Settings {
-  final String group;
+  final int group;
   final List<String>? relapseCategories;
   final QueryConfig moodQuery;
   final QueryConfig sleepQuery;
@@ -11,7 +11,7 @@ class Settings {
       this.chessTime);
 
   Settings.fromJson(Map<String, dynamic> json)
-      : group = json['group'] as String,
+      : group = json['group'] as int,
         relapseCategories = jsonPropertyAsList(json['relapse_categories']),
         moodQuery = QueryConfig.fromJson(json['mood_query']),
         sleepQuery = QueryConfig.fromJson(json['sleep_query']),
diff --git a/lib/pages/main_page.dart b/lib/pages/main_page.dart
index 76cec46..db4ff27 100644
--- a/lib/pages/main_page.dart
+++ b/lib/pages/main_page.dart
@@ -16,6 +16,7 @@ class MyHomePage extends StatefulWidget {
 
 class MyHomePageState extends State<MyHomePage> {
   int _selectedIndex = 4;
+  int? _gruppe;
 
   final List<String> _titles = [
     'Stimmung',
@@ -33,8 +34,8 @@ class MyHomePageState extends State<MyHomePage> {
   ];
 
   Future<void> _onItemTapped(int index) async {
-    bool isConfigured = (await getGroup()) != null;
-    print('Gruppe:  ${await getGroup()}, isConfigured: $isConfigured');
+    _gruppe = await getGroup();
+    bool isConfigured = _gruppe != null;
     setState(() {
       isConfigured
           ? _selectedIndex = index
@@ -52,7 +53,9 @@ class MyHomePageState extends State<MyHomePage> {
   @override
   Widget build(BuildContext context) {
     return Scaffold(
-      appBar: AppBar(title: Text(_titles[_selectedIndex])),
+      appBar: AppBar(
+          title: Text(
+              '${_titles[_selectedIndex]} ${_gruppe != null ? "Gruppe $_gruppe" : ""}')),
       body: _widgetOptions.elementAt(_selectedIndex),
       bottomNavigationBar: NavigationBar(
         onDestinationSelected: _onItemTapped,
diff --git a/lib/pages/scanner_page.dart b/lib/pages/scanner_page.dart
index 9ce6301..fcd2c30 100644
--- a/lib/pages/scanner_page.dart
+++ b/lib/pages/scanner_page.dart
@@ -30,6 +30,7 @@ class ScannerPageState extends State<ScannerPage> {
                   detectionTimeoutMs: 2000,
                 ),
                 onDetect: (capture) {
+                  //TODO Errorhandling!!
                   final List<Barcode> barcodes = capture.barcodes;
                   for (final barcode in barcodes) {
                     if (barcode.rawValue != null) {
diff --git a/lib/service/settings_service.dart b/lib/service/settings_service.dart
index f83c979..dca2839 100644
--- a/lib/service/settings_service.dart
+++ b/lib/service/settings_service.dart
@@ -3,7 +3,7 @@ import 'package:smoke_cess_app/models/settings.dart';
 import 'package:smoke_cess_app/service/json_service.dart';
 
 //access group setting which was saved in local storage
-Future<String?> getGroup() => _getStringSetting('group');
+Future<int?> getGroup() => _getIntSetting('group');
 
 Future<List<String>?> getRelapseCategories() =>
     _getStringListSetting('relapse_categories');
@@ -52,7 +52,7 @@ Future<void> loadSettingsFromLocalJSON() async {
 }
 
 void saveSettings(Settings settings) {
-  _setStringSetting('group', settings.group);
+  _setIntSetting('group', settings.group);
   _setStringListSetting('relapse_categories', settings.relapseCategories!);
   _setStringListSetting('mood_query_days', settings.moodQuery.days!);
   _setIntSetting('mood_query_hours', settings.moodQuery.hours);