diff --git a/lib/core/misc/demo_mode_status.dart b/lib/core/misc/demo_mode_status.dart
new file mode 100644
index 00000000..8d7b3a38
--- /dev/null
+++ b/lib/core/misc/demo_mode_status.dart
@@ -0,0 +1,6 @@
+// SPDX-License-Identifier: Apache-2.0
+// Copyright 2026 BitCodersNN
+
+class DemoModeStatus {
+  static bool demoModeEnabled = false;
+}
diff --git a/lib/core/viewmodels/auth_page/auth_page_view_model.dart b/lib/core/viewmodels/auth_page/auth_page_view_model.dart
index d989fe60..c5ea0330 100644
--- a/lib/core/viewmodels/auth_page/auth_page_view_model.dart
+++ b/lib/core/viewmodels/auth_page/auth_page_view_model.dart
@@ -3,6 +3,7 @@
 
 import 'package:unn_mobile/core/misc/authorisation/authorisation_request_result.dart';
 import 'package:unn_mobile/core/misc/custom_errors/auth_error_messages.dart';
+import 'package:unn_mobile/core/misc/demo_mode_status.dart';
 import 'package:unn_mobile/core/models/authorisation/auth_data.dart';
 import 'package:unn_mobile/core/providers/interfaces/authorisation/auth_data_provider.dart';
 import 'package:unn_mobile/core/services/interfaces/authorisation/unn_authorisation_service.dart';
@@ -32,21 +33,32 @@ class AuthPageViewModel extends BaseViewModel {
     _resetAuthError();
 
     AuthRequestResult? authResult;
+    final shouldEnableDemo =
+        user.startsWith('53effbc2-242e-43c1-9046-6580b77cccdb-');
+
+    final actualUserName = shouldEnableDemo ? user.substring(37) : user;
 
     try {
-      authResult = await _authorisationService.auth(user, password);
+      authResult = await _authorisationService.auth(
+        actualUserName,
+        password,
+      );
     } catch (error, stackTrace) {
       _loggerService.logError(error, stackTrace);
     }
 
     if (authResult == AuthRequestResult.success) {
-      await _authDataProvider.saveData(AuthData(user, password));
+      await _authDataProvider.saveData(AuthData(actualUserName, password));
     } else {
       authResult != null
           ? _setAuthError(text: authResult.errorMessage)
           : _setAuthError();
     }
 
+    if (authResult == AuthRequestResult.success) {
+      DemoModeStatus.demoModeEnabled = shouldEnableDemo;
+    }
+
     setState(ViewState.idle);
     return authResult == AuthRequestResult.success;
   }
diff --git a/lib/core/viewmodels/main_page/certificates_online/certificate_item_view_model.dart b/lib/core/viewmodels/main_page/certificates_online/certificate_item_view_model.dart
index defd04c4..bab00a6b 100644
--- a/lib/core/viewmodels/main_page/certificates_online/certificate_item_view_model.dart
+++ b/lib/core/viewmodels/main_page/certificates_online/certificate_item_view_model.dart
@@ -6,6 +6,7 @@ import 'dart:io';
 
 import 'package:unn_mobile/core/constants/date_pattern.dart';
 import 'package:unn_mobile/core/misc/date_time_utilities/date_time_extensions.dart';
+import 'package:unn_mobile/core/misc/demo_mode_status.dart';
 import 'package:unn_mobile/core/models/certificate/certificate.dart';
 import 'package:unn_mobile/core/models/certificate/practice_order.dart';
 import 'package:unn_mobile/core/services/interfaces/certificate/certificate_downloader_service.dart';
@@ -68,6 +69,9 @@ class CertificateItemViewModel extends BaseViewModel {
   }
 
   Future<void> askForPath() async => await busyCallAsync(() async {
+        if (DemoModeStatus.demoModeEnabled) {
+          return;
+        }
         if (_certificate == null) {
           return;
         }
diff --git a/lib/core/viewmodels/main_page/chat/chat_inside_view_model.dart b/lib/core/viewmodels/main_page/chat/chat_inside_view_model.dart
index b11e70a3..631bd2c4 100644
--- a/lib/core/viewmodels/main_page/chat/chat_inside_view_model.dart
+++ b/lib/core/viewmodels/main_page/chat/chat_inside_view_model.dart
@@ -8,6 +8,7 @@ import 'dart:math';
 import 'package:unn_mobile/core/aggregators/interfaces/message_service_aggregator.dart';
 import 'package:unn_mobile/core/misc/authorisation/try_login_and_retrieve_data.dart';
 import 'package:unn_mobile/core/misc/date_time_utilities/date_time_extensions.dart';
+import 'package:unn_mobile/core/misc/demo_mode_status.dart';
 import 'package:unn_mobile/core/misc/objects_with_pagination.dart';
 import 'package:unn_mobile/core/misc/user/current_user_sync_storage.dart';
 import 'package:unn_mobile/core/models/common/file_data.dart';
@@ -311,6 +312,9 @@ class ChatInsideViewModel extends BaseViewModel {
     int chatId,
     List<Message> messages,
   ) async {
+    if (DemoModeStatus.demoModeEnabled) {
+      return;
+    }
     await _messagesAggregator.readMessages(
       chatId: chatId,
       messageIds: messages.map((m) => m.messageId),
@@ -321,6 +325,9 @@ class ChatInsideViewModel extends BaseViewModel {
     FutureOr<T?> Function() sendFunction,
   ) async =>
       await typedBusyCallAsync<bool>(() async {
+        if (DemoModeStatus.demoModeEnabled) {
+          return false;
+        }
         if (_dialog == null) {
           return false;
         }
diff --git a/lib/core/viewmodels/main_page/chat/message_reaction_view_model.dart b/lib/core/viewmodels/main_page/chat/message_reaction_view_model.dart
index cea5b08b..2e949005 100644
--- a/lib/core/viewmodels/main_page/chat/message_reaction_view_model.dart
+++ b/lib/core/viewmodels/main_page/chat/message_reaction_view_model.dart
@@ -5,6 +5,7 @@ import 'dart:async';
 
 import 'package:injector/injector.dart';
 import 'package:unn_mobile/core/aggregators/interfaces/message_reaction_service_aggregator.dart';
+import 'package:unn_mobile/core/misc/demo_mode_status.dart';
 import 'package:unn_mobile/core/models/feed/rating_list.dart';
 import 'package:unn_mobile/core/models/profile/user_short_info.dart';
 import 'package:unn_mobile/core/viewmodels/factories/message_reaction_view_model_factory.dart';
@@ -32,6 +33,9 @@ class MessageReactionViewModel extends ReactionViewModelBase {
 
   @override
   FutureOr<void> setReaction(ReactionType? reaction) async {
+    if (DemoModeStatus.demoModeEnabled) {
+      return;
+    }
     if (profileId == ReactionViewModelBase.noId) {
       return;
     }
diff --git a/lib/core/viewmodels/main_page/feed/feed_post_view_model.dart b/lib/core/viewmodels/main_page/feed/feed_post_view_model.dart
index d2e9d7bb..185c8b11 100644
--- a/lib/core/viewmodels/main_page/feed/feed_post_view_model.dart
+++ b/lib/core/viewmodels/main_page/feed/feed_post_view_model.dart
@@ -4,6 +4,7 @@
 import 'package:event/event.dart';
 import 'package:html_unescape/html_unescape.dart';
 import 'package:injector/injector.dart';
+import 'package:unn_mobile/core/misc/demo_mode_status.dart';
 import 'package:unn_mobile/core/models/feed/blog_post.dart';
 import 'package:unn_mobile/core/models/feed/blog_post_data.dart';
 import 'package:unn_mobile/core/providers/interfaces/feed/last_feed_load_date_time_provider.dart';
@@ -123,6 +124,9 @@ class FeedPostViewModel extends BaseViewModel {
   }
 
   Future<void> togglePin() async {
+    if (DemoModeStatus.demoModeEnabled) {
+      return;
+    }
     final pinnedId = blogData.pinnedId ?? 0;
     final success = isPinned
         ? await _pinningService.unpin(pinnedId)
@@ -135,6 +139,9 @@ class FeedPostViewModel extends BaseViewModel {
   }
 
   Future<void> markReadIfImportant() async {
+    if (DemoModeStatus.demoModeEnabled) {
+      return;
+    }
     if (!isAnnouncement) {
       return;
     }
diff --git a/lib/core/viewmodels/main_page/feed/reaction_view_model.dart b/lib/core/viewmodels/main_page/feed/reaction_view_model.dart
index 4e29c783..86805c55 100644
--- a/lib/core/viewmodels/main_page/feed/reaction_view_model.dart
+++ b/lib/core/viewmodels/main_page/feed/reaction_view_model.dart
@@ -2,6 +2,7 @@
 // Copyright 2025 BitCodersNN
 
 import 'package:injector/injector.dart';
+import 'package:unn_mobile/core/misc/demo_mode_status.dart';
 import 'package:unn_mobile/core/models/feed/rating_list.dart';
 import 'package:unn_mobile/core/models/profile/user_short_info.dart';
 import 'package:unn_mobile/core/services/interfaces/feed/legacy/getting_rating_list.dart';
@@ -70,6 +71,9 @@ class ReactionViewModel extends ReactionViewModelBase {
 
   @override
   Future<void> setReaction(ReactionType? reaction) async {
+    if (DemoModeStatus.demoModeEnabled) {
+      return;
+    }
     if (profileId == ReactionViewModelBase.noId) {
       return;
     }
diff --git a/pubspec.yaml b/pubspec.yaml
index 150e87f6..ef9f32fe 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -2,7 +2,7 @@ name: unn_mobile
 description: A mobile application for UNN Portal website
 publish_to: 'none'
 
-version: 0.6.0+392
+version: 0.6.0+395
 
 environment:
   sdk: '>=3.1.2 <4.0.0'