diff --git a/refilc/assets/images/banner_texture.png b/refilc/assets/images/banner_texture.png
new file mode 100644
index 0000000..23f6aa7
Binary files /dev/null and b/refilc/assets/images/banner_texture.png differ
diff --git a/refilc/assets/images/ext_logo/apple.png b/refilc/assets/images/ext_logo/apple.png
new file mode 100644
index 0000000..7c5fd14
Binary files /dev/null and b/refilc/assets/images/ext_logo/apple.png differ
diff --git a/refilc/assets/images/ext_logo/google.png b/refilc/assets/images/ext_logo/google.png
new file mode 100644
index 0000000..a4a9918
Binary files /dev/null and b/refilc/assets/images/ext_logo/google.png differ
diff --git a/refilc/lib/database/init.dart b/refilc/lib/database/init.dart
index 7637892..98a71de 100644
--- a/refilc/lib/database/init.dart
+++ b/refilc/lib/database/init.dart
@@ -72,6 +72,7 @@ const userDataDB = DatabaseStruct("user_data", {
   // v5 shit
   "roundings": String,
   "grade_rarities": String,
+  "linked_accounts": String,
 });
 
 Future<void> createTable(Database db, DatabaseStruct struct) =>
@@ -134,6 +135,7 @@ Future<Database> initDB(DatabaseProvider database) async {
       // v5 shit
       "roundings": "{}",
       "grade_rarities": "{}",
+      "linked_accounts": "{}",
     });
   } catch (error) {
     print("ERROR: migrateDB: $error");
diff --git a/refilc/lib/database/query.dart b/refilc/lib/database/query.dart
index d2d82cc..4758ba2 100644
--- a/refilc/lib/database/query.dart
+++ b/refilc/lib/database/query.dart
@@ -1,5 +1,6 @@
 import 'dart:convert';
 import 'package:refilc/api/providers/database_provider.dart';
+import 'package:refilc/models/linked_account.dart';
 import 'package:refilc/models/self_note.dart';
 import 'package:refilc/models/subject_lesson_count.dart';
 import 'package:refilc/models/user.dart';
@@ -133,7 +134,14 @@ class UserDatabaseQuery {
         .map((e) => SendRecipient.fromJson(
             e,
             SendRecipientType.fromJson(e != null
-                ? e['tipus']
+                ? (e['tipus'] ??
+                    {
+                      'azonosito': '',
+                      'kod': '',
+                      'leiras': '',
+                      'nev': '',
+                      'rovidNev': ''
+                    })
                 : {
                     'azonosito': '',
                     'kod': '',
@@ -326,4 +334,17 @@ class UserDatabaseQuery {
     return (jsonDecode(raritiesJson) as Map)
         .map((key, value) => MapEntry(key.toString(), value.toString()));
   }
+
+  Future<List<LinkedAccount>> getLinkedAccounts(
+      {required String userId}) async {
+    List<Map> userData =
+        await db.query("user_data", where: "id = ?", whereArgs: [userId]);
+    if (userData.isEmpty) return [];
+    String? accountsJson = userData.elementAt(0)["linked_accounts"] as String?;
+    if (accountsJson == null) return [];
+    List<LinkedAccount> accounts = (jsonDecode(accountsJson) as List)
+        .map((e) => LinkedAccount.fromJson(e))
+        .toList();
+    return accounts;
+  }
 }
diff --git a/refilc/lib/models/linked_account.dart b/refilc/lib/models/linked_account.dart
new file mode 100644
index 0000000..636812c
--- /dev/null
+++ b/refilc/lib/models/linked_account.dart
@@ -0,0 +1,35 @@
+enum AccountType {
+  apple,
+  google,
+  meta,
+  qwid,
+}
+
+class LinkedAccount {
+  AccountType type;
+  String username;
+  String displayName;
+  String id;
+
+  LinkedAccount({
+    required this.type,
+    required this.username,
+    required this.displayName,
+    required this.id,
+  });
+
+  factory LinkedAccount.fromJson(Map json) {
+    return LinkedAccount(
+      type: json['type'] == 'apple'
+          ? AccountType.apple
+          : json['type'] == 'google'
+              ? AccountType.google
+              : json['type'] == 'meta'
+                  ? AccountType.meta
+                  : AccountType.qwid,
+      username: json['username'],
+      displayName: json['display_name'],
+      id: json['id'],
+    );
+  }
+}
diff --git a/refilc/lib/providers/third_party_provider.dart b/refilc/lib/providers/third_party_provider.dart
index 2b6af23..99dccf0 100644
--- a/refilc/lib/providers/third_party_provider.dart
+++ b/refilc/lib/providers/third_party_provider.dart
@@ -1,4 +1,8 @@
 import 'package:extension_google_sign_in_as_googleapis_auth/extension_google_sign_in_as_googleapis_auth.dart';
+import 'package:provider/provider.dart';
+import 'package:refilc/api/providers/database_provider.dart';
+import 'package:refilc/api/providers/user_provider.dart';
+import 'package:refilc/models/linked_account.dart';
 import 'package:refilc_kreta_api/controllers/timetable_controller.dart';
 import 'package:refilc_kreta_api/models/lesson.dart';
 import 'package:flutter/foundation.dart';
@@ -8,7 +12,9 @@ import 'package:google_sign_in/google_sign_in.dart';
 
 class ThirdPartyProvider with ChangeNotifier {
   late List<Event>? _googleEvents;
-  // late BuildContext _context;
+  late List<LinkedAccount> _linkedAccounts;
+
+  late BuildContext _context;
 
   static final _googleSignIn = GoogleSignIn(scopes: [
     CalendarApi.calendarScope,
@@ -16,13 +22,31 @@ class ThirdPartyProvider with ChangeNotifier {
   ]);
 
   List<Event> get googleEvents => _googleEvents ?? [];
+  List<LinkedAccount> get linkedAccounts => _linkedAccounts;
 
   ThirdPartyProvider({
     required BuildContext context,
+    List<LinkedAccount>? initialLinkedAccounts,
   }) {
-    // _context = context;
+    _context = context;
+    _linkedAccounts = initialLinkedAccounts ?? [];
   }
 
+  Future<void> restore() async {
+    String? userId = Provider.of<UserProvider>(_context, listen: false).id;
+
+    // Load absences from the database
+    if (userId != null) {
+      var dbLinkedAccounts =
+          await Provider.of<DatabaseProvider>(_context, listen: false)
+              .userQuery
+              .getLinkedAccounts(userId: userId);
+      _linkedAccounts = dbLinkedAccounts;
+    }
+  }
+
+  void fetch() async {}
+
   Future<GoogleSignInAccount?> googleSignIn() async {
     if (!await _googleSignIn.isSignedIn()) {
       return _googleSignIn.signIn();
diff --git a/refilc/pubspec.yaml b/refilc/pubspec.yaml
index e89da14..918146e 100644
--- a/refilc/pubspec.yaml
+++ b/refilc/pubspec.yaml
@@ -96,6 +96,7 @@ flutter:
     - assets/images/
     - assets/images/subject_covers/
     - assets/launch_icons/
+    - assets/images/ext_logo/
 
   fonts:
     - family: FilcIcons
diff --git a/refilc_kreta_api/lib/models/message.dart b/refilc_kreta_api/lib/models/message.dart
index 9d2982c..41807f5 100644
--- a/refilc_kreta_api/lib/models/message.dart
+++ b/refilc_kreta_api/lib/models/message.dart
@@ -198,7 +198,7 @@ class SendRecipientType {
 
   factory SendRecipientType.fromJson(Map json) {
     return SendRecipientType(
-      id: json['azonosito'],
+      id: json['azonosito'] != '' ? int.parse(json['azonosito']) : 0,
       code: json['kod'],
       description: json['leiras'],
       name: json['nev'],
diff --git a/refilc_mobile_ui/lib/screens/settings/settings_screen.i18n.dart b/refilc_mobile_ui/lib/screens/settings/settings_screen.i18n.dart
index e05f7ed..9907cc4 100644
--- a/refilc_mobile_ui/lib/screens/settings/settings_screen.i18n.dart
+++ b/refilc_mobile_ui/lib/screens/settings/settings_screen.i18n.dart
@@ -99,6 +99,7 @@ extension SettingsLocalization on String {
           "show_breaks": "Show Breaks",
           "fonts": "Fonts",
           "font_family": "Font Family",
+          "calendar_sync": "Calendar Sync",
         },
         "hu_hu": {
           "personal_details": "Személyes információk",
@@ -196,6 +197,7 @@ extension SettingsLocalization on String {
           "show_breaks": "Szünetek megjelenítése",
           "fonts": "Betűk",
           "font_family": "Betűtípus",
+          "calendar_sync": "Naptár szinkronizálás",
         },
         "de_de": {
           "personal_details": "Persönliche Angaben",
@@ -293,6 +295,7 @@ extension SettingsLocalization on String {
           "show_breaks": "Pausen anzeigen",
           "fonts": "Schriftarten",
           "font_family": "Schriftfamilie",
+          "calendar_sync": "heil hitler",
         },
       };
 
diff --git a/refilc_mobile_ui/lib/screens/settings/submenu/calendar_sync.dart b/refilc_mobile_ui/lib/screens/settings/submenu/calendar_sync.dart
new file mode 100644
index 0000000..d2737e7
--- /dev/null
+++ b/refilc_mobile_ui/lib/screens/settings/submenu/calendar_sync.dart
@@ -0,0 +1,262 @@
+// ignore_for_file: use_build_context_synchronously
+
+import 'package:collection/collection.dart';
+import 'package:refilc/api/providers/user_provider.dart';
+import 'package:refilc/models/linked_account.dart';
+import 'package:refilc/models/settings.dart';
+import 'package:refilc/models/shared_theme.dart';
+import 'package:refilc/providers/third_party_provider.dart';
+import 'package:refilc/theme/colors/accent.dart';
+import 'package:refilc/theme/colors/colors.dart';
+import 'package:refilc/theme/observer.dart';
+import 'package:refilc_kreta_api/providers/share_provider.dart';
+import 'package:refilc_mobile_ui/common/custom_snack_bar.dart';
+import 'package:refilc_mobile_ui/common/panel/panel_button.dart';
+import 'package:refilc_mobile_ui/common/splitted_panel/splitted_panel.dart';
+import 'package:flutter/cupertino.dart';
+import 'package:flutter/material.dart';
+import 'package:flutter_feather_icons/flutter_feather_icons.dart';
+import 'package:provider/provider.dart';
+import 'package:refilc_mobile_ui/screens/settings/settings_screen.i18n.dart';
+import 'package:share_plus/share_plus.dart';
+import 'package:flutter_any_logo/flutter_logo.dart';
+
+class MenuCalendarSync extends StatelessWidget {
+  const MenuCalendarSync({
+    super.key,
+    this.borderRadius = const BorderRadius.vertical(
+        top: Radius.circular(4.0), bottom: Radius.circular(4.0)),
+  });
+
+  final BorderRadius borderRadius;
+
+  @override
+  Widget build(BuildContext context) {
+    return PanelButton(
+      onPressed: () async {
+        Navigator.of(context, rootNavigator: true).push(CupertinoPageRoute(
+            builder: (context) => const CalendarSyncScreen()));
+      },
+      title: Text(
+        "calendar_sync".i18n,
+        style: TextStyle(
+          color: AppColors.of(context).text.withOpacity(.95),
+        ),
+      ),
+      leading: Icon(
+        FeatherIcons.calendar,
+        size: 22.0,
+        color: AppColors.of(context).text.withOpacity(.95),
+      ),
+      trailing: Icon(
+        FeatherIcons.chevronRight,
+        size: 22.0,
+        color: AppColors.of(context).text.withOpacity(0.95),
+      ),
+      borderRadius: borderRadius,
+    );
+  }
+}
+
+class CalendarSyncScreen extends StatefulWidget {
+  const CalendarSyncScreen({super.key});
+
+  @override
+  CalendarSyncScreenState createState() => CalendarSyncScreenState();
+}
+
+class CalendarSyncScreenState extends State<CalendarSyncScreen>
+    with SingleTickerProviderStateMixin {
+  late SettingsProvider settingsProvider;
+  late UserProvider user;
+  late ShareProvider shareProvider;
+
+  late AnimationController _hideContainersController;
+
+  @override
+  void initState() {
+    super.initState();
+
+    shareProvider = Provider.of<ShareProvider>(context, listen: false);
+
+    _hideContainersController = AnimationController(
+        vsync: this, duration: const Duration(milliseconds: 200));
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    settingsProvider = Provider.of<SettingsProvider>(context);
+    user = Provider.of<UserProvider>(context);
+
+    return AnimatedBuilder(
+      animation: _hideContainersController,
+      builder: (context, child) => Opacity(
+        opacity: 1 - _hideContainersController.value,
+        child: Scaffold(
+          appBar: AppBar(
+            surfaceTintColor: Theme.of(context).scaffoldBackgroundColor,
+            leading: BackButton(color: AppColors.of(context).text),
+            title: Text(
+              "calendar_sync".i18n,
+              style: TextStyle(color: AppColors.of(context).text),
+            ),
+          ),
+          body: SingleChildScrollView(
+            child: Padding(
+              padding:
+                  const EdgeInsets.symmetric(vertical: 16.0, horizontal: 24.0),
+              child: Column(
+                children: [
+                  // banner
+                  Padding(
+                    padding: const EdgeInsets.only(top: 10),
+                    child: Container(
+                      decoration: BoxDecoration(
+                        borderRadius: BorderRadius.circular(12.0),
+                        image: const DecorationImage(
+                          image: AssetImage(
+                            'assets/images/banner_texture.png',
+                          ),
+                          fit: BoxFit.cover,
+                        ),
+                      ),
+                      child: Padding(
+                        padding: const EdgeInsets.symmetric(
+                          horizontal: 20,
+                          vertical: 40,
+                        ),
+                        child: Row(
+                          mainAxisAlignment: MainAxisAlignment.center,
+                          crossAxisAlignment: CrossAxisAlignment.center,
+                          children: [
+                            Container(
+                              decoration: BoxDecoration(
+                                color: Colors.white,
+                                borderRadius: BorderRadius.circular(16.0),
+                              ),
+                              height: 64,
+                              width: 64,
+                              child: const Icon(
+                                Icons.calendar_month,
+                                size: 38.0,
+                              ),
+                            ),
+                            const SizedBox(width: 10),
+                            Icon(
+                              Icons.sync_alt_outlined,
+                              color:
+                                  AppColors.of(context).text.withOpacity(0.2),
+                              size: 20.0,
+                            ),
+                            const SizedBox(width: 10),
+                            Image.asset(
+                              'assets/icons/ic_rounded.png',
+                              width: 64,
+                              height: 64,
+                            )
+                          ],
+                        ),
+                      ),
+                    ),
+                  ),
+
+                  const SizedBox(
+                    height: 18.0,
+                  ),
+                  // choose account if not logged in
+                  if (Provider.of<ThirdPartyProvider>(context)
+                      .linkedAccounts
+                      .isEmpty)
+                    Column(
+                      children: [
+                        SplittedPanel(
+                          title: Text('choose_account'.i18n),
+                          padding: EdgeInsets.zero,
+                          cardPadding: const EdgeInsets.all(4.0),
+                          isSeparated: true,
+                          children: [
+                            PanelButton(
+                              onPressed: () async {
+                                await Provider.of<ThirdPartyProvider>(context,
+                                        listen: false)
+                                    .googleSignIn();
+                              },
+                              title: Text(
+                                'Google',
+                                style: TextStyle(
+                                  color: AppColors.of(context)
+                                      .text
+                                      .withOpacity(.95),
+                                ),
+                              ),
+                              leading: Image.asset(
+                                'assets/images/ext_logo/google.png',
+                                width: 24.0,
+                                height: 24.0,
+                              ),
+                              borderRadius: const BorderRadius.vertical(
+                                top: Radius.circular(12),
+                                bottom: Radius.circular(12),
+                              ),
+                            ),
+                          ],
+                        ),
+                        const SizedBox(
+                          height: 9.0,
+                        ),
+                        SplittedPanel(
+                          padding: EdgeInsets.zero,
+                          cardPadding: const EdgeInsets.all(4.0),
+                          isSeparated: true,
+                          children: [
+                            PanelButton(
+                              onPressed: null,
+                              title: Text(
+                                'Apple',
+                                style: TextStyle(
+                                  color: AppColors.of(context)
+                                      .text
+                                      .withOpacity(.55),
+                                  decoration: TextDecoration.lineThrough,
+                                ),
+                              ),
+                              leading: Image.asset(
+                                'assets/images/ext_logo/apple.png',
+                                width: 24.0,
+                                height: 24.0,
+                              ),
+                              trailing: Text(
+                                'Hamarosan'.i18n,
+                                style: const TextStyle(
+                                    fontStyle: FontStyle.italic,
+                                    fontSize: 14.0),
+                              ),
+                              borderRadius: const BorderRadius.vertical(
+                                top: Radius.circular(12),
+                                bottom: Radius.circular(12),
+                              ),
+                            ),
+                          ],
+                        ),
+                      ],
+                    ),
+
+                  const SizedBox(
+                    height: 18.0,
+                  ),
+                  // own paints
+                  SplittedPanel(
+                    title: Text('public_paint'.i18n),
+                    padding: EdgeInsets.zero,
+                    cardPadding: const EdgeInsets.all(4.0),
+                    children: [],
+                  ),
+                ],
+              ),
+            ),
+          ),
+        ),
+      ),
+    );
+  }
+}
diff --git a/refilc_mobile_ui/lib/screens/settings/submenu/extras_screen.dart b/refilc_mobile_ui/lib/screens/settings/submenu/extras_screen.dart
index f75edef..613c387 100644
--- a/refilc_mobile_ui/lib/screens/settings/submenu/extras_screen.dart
+++ b/refilc_mobile_ui/lib/screens/settings/submenu/extras_screen.dart
@@ -9,6 +9,7 @@ import 'package:flutter/cupertino.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter_feather_icons/flutter_feather_icons.dart';
 import 'package:provider/provider.dart';
+import 'package:refilc_mobile_ui/screens/settings/submenu/calendar_sync.dart';
 import 'package:refilc_plus/models/premium_scopes.dart';
 import 'package:refilc_plus/providers/premium_provider.dart';
 import 'package:refilc_plus/ui/mobile/premium/upsell.dart';
@@ -147,6 +148,16 @@ class ExtrasSettingsScreenState extends State<ExtrasSettingsScreen> {
                   WelcomeMessagePanelButton(settingsProvider, user),
                 ],
               ),
+              SplittedPanel(
+                padding: const EdgeInsets.only(top: 9.0),
+                cardPadding: const EdgeInsets.all(4.0),
+                isSeparated: true,
+                children: [
+                  MenuCalendarSync(
+                    borderRadius: BorderRadius.circular(12.0),
+                  ),
+                ],
+              ),
             ],
           ),
         ),
diff --git a/refilc_mobile_ui/pubspec.yaml b/refilc_mobile_ui/pubspec.yaml
index 32762f7..1ff876d 100644
--- a/refilc_mobile_ui/pubspec.yaml
+++ b/refilc_mobile_ui/pubspec.yaml
@@ -65,6 +65,7 @@ dependencies:
   maps_launcher: ^2.2.0
   google_fonts: ^6.1.0
   flutter_stripe: ^10.0.0
+  flutter_any_logo: ^1.1.1
   
 dev_dependencies:
   flutter_lints: ^3.0.1