diff --git a/.github/workflows/Release.yaml b/.github/workflows/Release.yaml
index 00a0ce3..87449d9 100644
--- a/.github/workflows/Release.yaml
+++ b/.github/workflows/Release.yaml
@@ -16,7 +16,7 @@ jobs:
 # Константы, используемые далее по тексту
     env:
       PROJ: ${{ github.event.repository.name }}
-      TAG: '3.4.2'
+      TAG: '3.5'
 
     steps:
 # Проверка состава репозитория (без анализа, как может показаться)
diff --git a/.release/EnchantIt.apk b/.release/EnchantIt.apk
index 8569d0f..48644a5 100644
Binary files a/.release/EnchantIt.apk and b/.release/EnchantIt.apk differ
diff --git a/.release/Release.md b/.release/Release.md
index 00c989c..b2c5bd3 100644
--- a/.release/Release.md
+++ b/.release/Release.md
@@ -1,3 +1,6 @@
-_Changes for v 3.4.2_:
+_Changes for v 3.5_:
+- Background service code has been reworked, a number of compatibility issues with Android 13 have been fixed;
+- App permissions checker has been rewritten;
+- Tips storage has been rewritten (may cause their repeating once more);
 - Update for XPUN has been applied;
 - Video guides have been updated
diff --git a/Changes.log b/Changes.log
index e0a7974..444e2e5 100644
--- a/Changes.log
+++ b/Changes.log
@@ -1,5 +1,10 @@
 PA detector: changes log
 
+Version 3.5:
+• Background service code has been reworked, a number of compatibility issues with Android 13 have been fixed;
+• App permissions checker has been rewritten;
+• Tips storage has been rewritten (may cause their repeating once more)
+
 Version 3.4.2:
 • Update for XPUN has been applied
 
diff --git a/src/AboutPage.xaml b/src/AboutPage.xaml
index f03975a..16756b6 100644
--- a/src/AboutPage.xaml
+++ b/src/AboutPage.xaml
@@ -17,6 +17,9 @@
 				<Button x:Name="ManualsButton" HorizontalOptions="Center" />
 				<Button x:Name="HelpButton" HorizontalOptions="Center" />
 
+				<Label x:Name="AllowWritingTip" HorizontalOptions="Center" />
+				<Button x:Name="AllowWritingButton" HorizontalOptions="Center" />
+
 				<BoxView VerticalOptions="Center" HorizontalOptions="Center" HeightRequest="1" 
 					WidthRequest="200" Color="#606060" Margin="9" />
 
diff --git a/src/App.xaml.cs b/src/App.xaml.cs
index 5d44236..e19217d 100644
--- a/src/App.xaml.cs
+++ b/src/App.xaml.cs
@@ -1,5 +1,4 @@
 using Android.Net;
-using Android.Util;
 using Java.Security;
 using System;
 using System.Collections.Generic;
@@ -69,6 +68,8 @@ private enum GenerationMethods
 		private bool stopGeneration = false;
 		private double oldScale = 0, newScale = 0;
 
+		private RDAppStartupFlags flags;
+
 		// Множитель шкалы для регистратора отклонений ГПСЧ
 		private const double scaleSizeFactor = 8.0;
 
@@ -157,10 +158,11 @@ private readonly Color
 		/// <summary>
 		/// Конструктор. Точка входа приложения
 		/// </summary>
-		public App (bool Huawei)
+		public App (RDAppStartupFlags Flags)
 			{
 			// Инициализация
 			InitializeComponent ();
+			flags = Flags;
 
 			// Общая конструкция страниц приложения
 			MainPage = new MasterPage ();
@@ -247,6 +249,29 @@ public App (bool Huawei)
 				RDLocale.GetDefaultText (RDLDefaultTexts.Control_GenericSettings),
 				RDLabelTypes.HeaderLeft);
 
+			// Управление правами
+			Label allowServiceTip;
+			Button allowServiceButton;
+			if (!Flags.HasFlag (RDAppStartupFlags.CanWriteFiles))
+				{
+				allowServiceTip = AndroidSupport.ApplyLabelSettings (aboutPage, "AllowWritingTip",
+					RDLocale.GetDefaultText (RDLDefaultTexts.Message_ReadWritePermission), RDLabelTypes.ErrorTip);
+
+				allowServiceButton = AndroidSupport.ApplyButtonSettings (aboutPage, "AllowWritingButton",
+					RDLocale.GetDefaultText (RDLDefaultTexts.Button_Open), aboutFieldBackColor, CallAppSettings, false);
+				allowServiceButton.HorizontalOptions = LayoutOptions.Center;
+				}
+			else
+				{
+				allowServiceTip = AndroidSupport.ApplyLabelSettings (aboutPage, "AllowWritingTip",
+					" ", RDLabelTypes.Tip);
+				allowServiceTip.IsVisible = false;
+
+				allowServiceButton = AndroidSupport.ApplyButtonSettings (aboutPage, "AllowWritingButton",
+					" ", aboutFieldBackColor, null, false);
+				allowServiceButton.IsVisible = false;
+				}
+
 			// Кнопки управления
 			AndroidSupport.ApplyLabelSettings (aboutPage, "RestartTipLabel",
 				RDLocale.GetDefaultText (RDLDefaultTexts.Message_RestartRequired),
@@ -361,14 +386,15 @@ public App (bool Huawei)
 			countOfMatches = 0; // Признак отмены обновления при отсутствии результатов
 
 			// Отображение подсказок первого старта
-			ShowTips (Huawei);
+			ShowTips ();
 			}
 
 		// Метод отображает подсказки при первом запуске
-		private async void ShowTips (bool Huawei)
+		private async void ShowTips ()
 			{
 			// Контроль XPUN
-			await AndroidSupport.XPUNLoop (Huawei);
+			if (!flags.HasFlag (RDAppStartupFlags.Huawei))
+				await AndroidSupport.XPUNLoop ();
 
 			// Защита
 			if (firstStart)
@@ -411,6 +437,12 @@ protected override void OnSleep ()
 			catch { }
 			}
 
+		// Вызов настроек приложения (для Android 12 и выше)
+		private void CallAppSettings (object sender, EventArgs e)
+			{
+			AndroidSupport.CallAppSettings ();
+			}
+
 		#endregion
 
 		#region О приложении
diff --git a/src/MainActivity.cs b/src/MainActivity.cs
index cf1274b..16ac218 100644
--- a/src/MainActivity.cs
+++ b/src/MainActivity.cs
@@ -65,14 +65,17 @@ protected override void OnCreate (Bundle savedInstanceState)
 			// Запрет на переход в ждущий режим
 			this.Window.AddFlags (WindowManagerFlags.KeepScreenOn);
 
-#if HUAWEI
-			LoadApplication (new App (true));
-#else
-			LoadApplication (new App (false));
-#endif
+			/*#if HUAWEI
+						LoadApplication (new App (true));
+			#else
+						LoadApplication (new App (false));
+			#endif*/
+			RDAppStartupFlags flags = AndroidSupportX.GetAppStartupFlags (RDAppStartupFlags.Huawei |
+				RDAppStartupFlags.CanWriteFiles, this);
+			LoadApplication (new App (flags));
 			}
 
-		/// <summary>
+		/*/// <summary>
 		/// Запрос разрешений для приложения
 		/// </summary>
 		public override void OnRequestPermissionsResult (int requestCode, string[] permissions,
@@ -81,6 +84,6 @@ public override void OnRequestPermissionsResult (int requestCode, string[] permi
 			Xamarin.Essentials.Platform.OnRequestPermissionsResult (requestCode, permissions, grantResults);
 
 			base.OnRequestPermissionsResult (requestCode, permissions, grantResults);
-			}
+			}*/
 		}
 	}