diff --git a/native-route/ios/RSSuper/Services/NotificationManager.swift b/native-route/ios/RSSuper/Services/NotificationManager.swift
index c063665..496dfe3 100644
--- a/native-route/ios/RSSuper/Services/NotificationManager.swift
+++ b/native-route/ios/RSSuper/Services/NotificationManager.swift
@@ -172,8 +172,9 @@ class NotificationManager {
     }
     
     /// Check if notification manager is available
-    func isAvailable() -> Bool {
-        return notificationService.isAvailable
+    /// - Parameter completionHandler: Callback with availability status
+    func isAvailable(_ completionHandler: @escaping (Bool) -> Void) {
+        notificationService.isAvailable(completionHandler)
     }
 }
 
diff --git a/native-route/ios/RSSuper/Services/NotificationService.swift b/native-route/ios/RSSuper/Services/NotificationService.swift
index 47b46f8..e5637fa 100644
--- a/native-route/ios/RSSuper/Services/NotificationService.swift
+++ b/native-route/ios/RSSuper/Services/NotificationService.swift
@@ -43,14 +43,17 @@ class NotificationService {
     
     /// Request notification authorization
     /// - Parameter context: Application context
-    private func requestAuthorization(context: Any) throws {
+    private func requestAuthorization(context: Any) {
         let options: UNAuthorizationOptions = [.alert, .sound, .badge]
         
-        let authorized = try unuserNotifications.requestAuthorization(options: options)
-        if authorized {
-            print("Notification authorization authorized")
-        } else {
-            print("Notification authorization denied")
+        unuserNotifications.requestAuthorization(options: options) { authorized, error in
+            if let error = error {
+                print("Notification authorization error: \(error)")
+            } else if authorized {
+                print("Notification authorization authorized")
+            } else {
+                print("Notification authorization denied")
+            }
         }
     }
     
@@ -156,12 +159,11 @@ class NotificationService {
     }
     
     /// Check if notification service is available
-    var isAvailable: Bool {
-        var authorized = false
+    /// - Parameter completionHandler: Callback with authorization status
+    func isAvailable(_ completionHandler: @escaping (Bool) -> Void) {
         unuserNotifications.getNotificationSettings { settings in
-            authorized = settings.authorizationStatus == .authorized
+            completionHandler(settings.authorizationStatus == .authorized)
         }
-        return authorized
     }
     
     /// Get current authorization status
diff --git a/native-route/ios/RSSuperTests/SettingsStoreTests.swift b/native-route/ios/RSSuperTests/SettingsStoreTests.swift
new file mode 100644
index 0000000..65ef7e3
--- /dev/null
+++ b/native-route/ios/RSSuperTests/SettingsStoreTests.swift
@@ -0,0 +1,162 @@
+import XCTest
+@testable import RSSuper
+
+class SettingsStoreTests: XCTestCase {
+
+    var settingsStore: SettingsStore!
+    var appSettings: AppSettings!
+
+    override func setUp() {
+        super.setUp()
+        settingsStore = SettingsStore.shared
+        appSettings = AppSettings.shared
+    }
+
+    override func tearDown() {
+        settingsStore = nil
+        appSettings = nil
+        super.tearDown()
+    }
+
+    func testGetFontSize_defaultValue() {
+        let fontSize = settingsStore.getFontSize()
+        XCTAssertNotNil(fontSize)
+    }
+
+    func testSetFontSize() {
+        let fontSize: ReadingPreferences.FontSize = .large
+        settingsStore.setFontSize(fontSize)
+        XCTAssertEqual(settingsStore.getFontSize(), fontSize)
+    }
+
+    func testGetLineHeight_defaultValue() {
+        let lineHeight = settingsStore.getLineHeight()
+        XCTAssertNotNil(lineHeight)
+    }
+
+    func testSetLineHeight() {
+        let lineHeight: ReadingPreferences.LineHeight = .tall
+        settingsStore.setLineHeight(lineHeight)
+        XCTAssertEqual(settingsStore.getLineHeight(), lineHeight)
+    }
+
+    func testIsShowTableOfContents_defaultValue() {
+        let show = settingsStore.isShowTableOfContents()
+        XCTAssertNotNil(show)
+    }
+
+    func testSetShowTableOfContents() {
+        settingsStore.setShowTableOfContents(true)
+        XCTAssertTrue(settingsStore.isShowTableOfContents())
+    }
+
+    func testIsShowReadingTime_defaultValue() {
+        let show = settingsStore.isShowReadingTime()
+        XCTAssertNotNil(show)
+    }
+
+    func testSetShowReadingTime() {
+        settingsStore.setShowReadingTime(true)
+        XCTAssertTrue(settingsStore.isShowReadingTime())
+    }
+
+    func testIsShowAuthor_defaultValue() {
+        let show = settingsStore.isShowAuthor()
+        XCTAssertNotNil(show)
+    }
+
+    func testSetShowAuthor() {
+        settingsStore.setShowAuthor(true)
+        XCTAssertTrue(settingsStore.isShowAuthor())
+    }
+
+    func testIsShowDate_defaultValue() {
+        let show = settingsStore.isShowDate()
+        XCTAssertNotNil(show)
+    }
+
+    func testSetShowDate() {
+        settingsStore.setShowDate(true)
+        XCTAssertTrue(settingsStore.isShowDate())
+    }
+
+    func testIsNewArticlesEnabled_defaultValue() {
+        let enabled = settingsStore.isNewArticlesEnabled()
+        XCTAssertNotNil(enabled)
+    }
+
+    func testSetNewArticles() {
+        settingsStore.setNewArticles(true)
+        XCTAssertTrue(settingsStore.isNewArticlesEnabled())
+    }
+
+    func testIsEpisodeReleasesEnabled_defaultValue() {
+        let enabled = settingsStore.isEpisodeReleasesEnabled()
+        XCTAssertNotNil(enabled)
+    }
+
+    func testSetEpisodeReleases() {
+        settingsStore.setEpisodeReleases(true)
+        XCTAssertTrue(settingsStore.isEpisodeReleasesEnabled())
+    }
+
+    func testIsCustomAlertsEnabled_defaultValue() {
+        let enabled = settingsStore.isCustomAlertsEnabled()
+        XCTAssertNotNil(enabled)
+    }
+
+    func testSetCustomAlerts() {
+        settingsStore.setCustomAlerts(true)
+        XCTAssertTrue(settingsStore.isCustomAlertsEnabled())
+    }
+
+    func testIsBadgeCountEnabled_defaultValue() {
+        let enabled = settingsStore.isBadgeCountEnabled()
+        XCTAssertNotNil(enabled)
+    }
+
+    func testSetBadgeCount() {
+        settingsStore.setBadgeCount(true)
+        XCTAssertTrue(settingsStore.isBadgeCountEnabled())
+    }
+
+    func testIsSoundEnabled_defaultValue() {
+        let enabled = settingsStore.isSoundEnabled()
+        XCTAssertNotNil(enabled)
+    }
+
+    func testSetSound() {
+        settingsStore.setSound(true)
+        XCTAssertTrue(settingsStore.isSoundEnabled())
+    }
+
+    func testIsVibrationEnabled_defaultValue() {
+        let enabled = settingsStore.isVibrationEnabled()
+        XCTAssertNotNil(enabled)
+    }
+
+    func testSetVibration() {
+        settingsStore.setVibration(true)
+        XCTAssertTrue(settingsStore.isVibrationEnabled())
+    }
+
+    func testIsAppGroupAvailable() {
+        let available = settingsStore.isAppGroupAvailable()
+        XCTAssertNotNil(available)
+    }
+
+    func testGetReadingPreferences() {
+        let prefs = settingsStore.getReadingPreferences()
+        XCTAssertNotNil(prefs)
+    }
+
+    func testGetNotificationPreferences() {
+        let prefs = settingsStore.getNotificationPreferences()
+        XCTAssertNotNil(prefs)
+    }
+
+    func testGetAllPreferences() {
+        let prefs = settingsStore.getAllPreferences()
+        XCTAssertNotNil(prefs)
+    }
+}