diff --git a/app/src/main/kotlin/app/dapk/st/SharedPreferencesDelegate.kt b/app/src/main/kotlin/app/dapk/st/SharedPreferencesDelegate.kt
index 2fb5fe4..f9fb86e 100644
--- a/app/src/main/kotlin/app/dapk/st/SharedPreferencesDelegate.kt
+++ b/app/src/main/kotlin/app/dapk/st/SharedPreferencesDelegate.kt
@@ -19,12 +19,24 @@ internal class SharedPreferencesDelegate(
         }
     }
 
+    override suspend fun store(key: String, value: Set<String>) {
+        coroutineDispatchers.withIoContext {
+            preferences.edit().putStringSet(key, value).apply()
+        }
+    }
+
     override suspend fun readString(key: String): String? {
         return coroutineDispatchers.withIoContext {
             preferences.getString(key, null)
         }
     }
 
+    override suspend fun readStrings(key: String): Set<String>? {
+        return coroutineDispatchers.withIoContext {
+            preferences.getStringSet(key, null)
+        }
+    }
+
     override suspend fun remove(key: String) {
         coroutineDispatchers.withIoContext {
             preferences.edit().remove(key).apply()
diff --git a/app/src/main/kotlin/app/dapk/st/graph/AppModule.kt b/app/src/main/kotlin/app/dapk/st/graph/AppModule.kt
index 940c2f1..c26b826 100644
--- a/app/src/main/kotlin/app/dapk/st/graph/AppModule.kt
+++ b/app/src/main/kotlin/app/dapk/st/graph/AppModule.kt
@@ -18,6 +18,7 @@ import app.dapk.st.core.extensions.ErrorTracker
 import app.dapk.st.core.extensions.unsafeLazy
 import app.dapk.st.directory.DirectoryModule
 import app.dapk.st.domain.StoreModule
+import app.dapk.st.domain.room.MutedRoomsStorePersistence
 import app.dapk.st.engine.MatrixEngine
 import app.dapk.st.firebase.messaging.MessagingModule
 import app.dapk.st.home.BetaVersionUpgradeUseCase
@@ -163,6 +164,7 @@ internal class FeatureModules internal constructor(
             context,
             storeModule.value.messageStore(),
             deviceMeta,
+            MutedRoomsStorePersistence(storeModule.value.cachingPreferences)
         )
     }
     val homeModule by unsafeLazy {
diff --git a/core/src/main/kotlin/app/dapk/st/core/JobBag.kt b/core/src/main/kotlin/app/dapk/st/core/JobBag.kt
index 18066b4..3d91bfc 100644
--- a/core/src/main/kotlin/app/dapk/st/core/JobBag.kt
+++ b/core/src/main/kotlin/app/dapk/st/core/JobBag.kt
@@ -6,7 +6,8 @@ class JobBag {
 
     private val jobs = mutableMapOf<String, Job>()
 
-    fun add(key: String, job: Job) {
+    fun replace(key: String, job: Job) {
+        jobs[key]?.cancel()
         jobs[key] = job
     }
 
diff --git a/core/src/main/kotlin/app/dapk/st/core/Preferences.kt b/core/src/main/kotlin/app/dapk/st/core/Preferences.kt
index bac20a1..9385b95 100644
--- a/core/src/main/kotlin/app/dapk/st/core/Preferences.kt
+++ b/core/src/main/kotlin/app/dapk/st/core/Preferences.kt
@@ -3,7 +3,9 @@ package app.dapk.st.core
 interface Preferences {
 
     suspend fun store(key: String, value: String)
+    suspend fun store(key: String, value: Set<String>)
     suspend fun readString(key: String): String?
+    suspend fun readStrings(key: String): Set<String>?
     suspend fun clear()
     suspend fun remove(key: String)
 }
@@ -17,4 +19,14 @@ suspend fun CachedPreferences.readBoolean(key: String, defaultValue: Boolean) =
     .toBooleanStrict()
 
 suspend fun Preferences.readBoolean(key: String) = this.readString(key)?.toBooleanStrict()
-suspend fun Preferences.store(key: String, value: Boolean) = this.store(key, value.toString())
\ No newline at end of file
+suspend fun Preferences.store(key: String, value: Boolean) = this.store(key, value.toString())
+suspend fun Preferences.append(key: String, value: String) {
+    val current = this.readStrings(key) ?: emptySet()
+    this.store(key, current + value)
+}
+
+suspend fun Preferences.removeFromSet(key: String, value: String) {
+    val current = this.readStrings(key) ?: emptySet()
+    this.store(key, current - value)
+}
+
diff --git a/domains/store/src/main/kotlin/app/dapk/st/domain/preference/CachingPreferences.kt b/domains/store/src/main/kotlin/app/dapk/st/domain/preference/CachingPreferences.kt
index 1d891b4..f873df1 100644
--- a/domains/store/src/main/kotlin/app/dapk/st/domain/preference/CachingPreferences.kt
+++ b/domains/store/src/main/kotlin/app/dapk/st/domain/preference/CachingPreferences.kt
@@ -4,11 +4,23 @@ import app.dapk.st.core.CachedPreferences
 import app.dapk.st.core.Preferences
 
 class CachingPreferences(private val cache: PropertyCache, private val preferences: Preferences) : CachedPreferences {
+
     override suspend fun store(key: String, value: String) {
         cache.setValue(key, value)
         preferences.store(key, value)
     }
 
+    override suspend fun store(key: String, value: Set<String>) {
+        cache.setValue(key, value)
+        preferences.store(key, value)
+    }
+
+    override suspend fun readStrings(key: String): Set<String>? {
+        return cache.getValue(key) ?: preferences.readStrings(key)?.also {
+            cache.setValue(key, it)
+        }
+    }
+
     override suspend fun readString(key: String): String? {
         return cache.getValue(key) ?: preferences.readString(key)?.also {
             cache.setValue(key, it)
diff --git a/domains/store/src/main/kotlin/app/dapk/st/domain/room/MutedRoomsStore.kt b/domains/store/src/main/kotlin/app/dapk/st/domain/room/MutedRoomsStore.kt
new file mode 100644
index 0000000..81cabcd
--- /dev/null
+++ b/domains/store/src/main/kotlin/app/dapk/st/domain/room/MutedRoomsStore.kt
@@ -0,0 +1,40 @@
+package app.dapk.st.domain.room
+
+import app.dapk.st.core.Preferences
+import app.dapk.st.core.append
+import app.dapk.st.core.removeFromSet
+import app.dapk.st.matrix.common.RoomId
+
+private const val KEY_MUTE = "mute"
+
+interface MutedRoomsStore {
+    suspend fun mute(roomId: RoomId)
+    suspend fun unmute(roomId: RoomId)
+    suspend fun isMuted(roomId: RoomId): Boolean
+    suspend fun allMuted(): Set<RoomId>
+}
+
+class MutedRoomsStorePersistence(
+    private val preferences: Preferences
+) : MutedRoomsStore {
+
+    override suspend fun mute(roomId: RoomId) {
+        preferences.append(KEY_MUTE, roomId.value)
+    }
+
+    override suspend fun unmute(roomId: RoomId) {
+        preferences.removeFromSet(KEY_MUTE, roomId.value)
+    }
+
+    override suspend fun isMuted(roomId: RoomId): Boolean {
+        val allMuted = allMuted()
+        println("??? isMuted - $roomId")
+        println("??? all - $allMuted")
+        return allMuted.contains(roomId)
+    }
+
+    override suspend fun allMuted(): Set<RoomId> {
+        return preferences.readStrings(KEY_MUTE)?.map { RoomId(it) }?.toSet() ?: emptySet()
+    }
+
+}
\ No newline at end of file
diff --git a/features/directory/src/main/kotlin/app/dapk/st/directory/state/DirectoryReducer.kt b/features/directory/src/main/kotlin/app/dapk/st/directory/state/DirectoryReducer.kt
index bd997f8..41c8f8b 100644
--- a/features/directory/src/main/kotlin/app/dapk/st/directory/state/DirectoryReducer.kt
+++ b/features/directory/src/main/kotlin/app/dapk/st/directory/state/DirectoryReducer.kt
@@ -21,7 +21,7 @@ internal fun directoryReducer(
         multi(ComponentLifecycle::class) { action ->
             when (action) {
                 ComponentLifecycle.OnVisible -> async { _ ->
-                    jobBag.add(KEY_SYNCING_JOB, chatEngine.directory().onEach {
+                    jobBag.replace(KEY_SYNCING_JOB, chatEngine.directory().onEach {
                         shortcutHandler.onDirectoryUpdate(it.map { it.overview })
                         when (it.isEmpty()) {
                             true -> dispatch(DirectoryStateChange.Empty)
diff --git a/features/directory/src/test/kotlin/app/dapk/st/directory/DirectoryReducerTest.kt b/features/directory/src/test/kotlin/app/dapk/st/directory/DirectoryReducerTest.kt
index ce6fe82..78767a2 100644
--- a/features/directory/src/test/kotlin/app/dapk/st/directory/DirectoryReducerTest.kt
+++ b/features/directory/src/test/kotlin/app/dapk/st/directory/DirectoryReducerTest.kt
@@ -38,7 +38,7 @@ class DirectoryReducerTest {
     @Test
     fun `given directory content, when Visible, then updates shortcuts and dispatches room state`() = runReducerTest {
         fakeShortcutHandler.instance.expectUnit { it.onDirectoryUpdate(listOf(AN_OVERVIEW)) }
-        fakeJobBag.instance.expect { it.add("sync", any()) }
+        fakeJobBag.instance.expect { it.replace("sync", any()) }
         fakeChatEngine.givenDirectory().returns(flowOf(listOf(AN_OVERVIEW_STATE)))
 
         reduce(ComponentLifecycle.OnVisible)
@@ -49,7 +49,7 @@ class DirectoryReducerTest {
     @Test
     fun `given no directory content, when Visible, then updates shortcuts and dispatches empty state`() = runReducerTest {
         fakeShortcutHandler.instance.expectUnit { it.onDirectoryUpdate(emptyList()) }
-        fakeJobBag.instance.expect { it.add("sync", any()) }
+        fakeJobBag.instance.expect { it.replace("sync", any()) }
         fakeChatEngine.givenDirectory().returns(flowOf(emptyList()))
 
         reduce(ComponentLifecycle.OnVisible)
diff --git a/features/messenger/src/main/kotlin/app/dapk/st/messenger/MessengerModule.kt b/features/messenger/src/main/kotlin/app/dapk/st/messenger/MessengerModule.kt
index 50f12ab..aaa0b04 100644
--- a/features/messenger/src/main/kotlin/app/dapk/st/messenger/MessengerModule.kt
+++ b/features/messenger/src/main/kotlin/app/dapk/st/messenger/MessengerModule.kt
@@ -10,6 +10,7 @@ import app.dapk.st.domain.application.message.MessageOptionsStore
 import app.dapk.st.engine.ChatEngine
 import app.dapk.st.matrix.common.RoomId
 import app.dapk.st.messenger.state.MessengerState
+import app.dapk.st.domain.room.MutedRoomsStore
 import app.dapk.st.messenger.state.messengerReducer
 
 class MessengerModule(
@@ -17,6 +18,7 @@ class MessengerModule(
     private val context: Context,
     private val messageOptionsStore: MessageOptionsStore,
     private val deviceMeta: DeviceMeta,
+    private val mutedRoomsStore: MutedRoomsStore,
 ) : ProvidableModule {
 
     internal fun messengerState(launchPayload: MessagerActivityPayload): MessengerState {
@@ -27,6 +29,7 @@ class MessengerModule(
                 CopyToClipboard(context.getSystemService(Context.CLIPBOARD_SERVICE) as ClipboardManager),
                 deviceMeta,
                 messageOptionsStore,
+                mutedRoomsStore,
                 RoomId(launchPayload.roomId),
                 launchPayload.attachments,
                 it
diff --git a/features/messenger/src/main/kotlin/app/dapk/st/messenger/MessengerScreen.kt b/features/messenger/src/main/kotlin/app/dapk/st/messenger/MessengerScreen.kt
index a661231..8258de0 100644
--- a/features/messenger/src/main/kotlin/app/dapk/st/messenger/MessengerScreen.kt
+++ b/features/messenger/src/main/kotlin/app/dapk/st/messenger/MessengerScreen.kt
@@ -87,9 +87,17 @@ internal fun MessengerScreen(
 
     Column {
         Toolbar(onNavigate = { navigator.navigate.upToHome() }, roomTitle, actions = {
-//            OverflowMenu {
-//                DropdownMenuItem(text = { Text("Settings", color = MaterialTheme.colorScheme.onSecondaryContainer) }, onClick = {})
-//            }
+            OverflowMenu {
+                when (state.isMuted) {
+                    true -> DropdownMenuItem(text = { Text("Unmute notifications", color = MaterialTheme.colorScheme.onSecondaryContainer) }, onClick = {
+                        viewModel.dispatch(ScreenAction.Notifications.Unmute)
+                    })
+
+                    false -> DropdownMenuItem(text = { Text("Mute notifications", color = MaterialTheme.colorScheme.onSecondaryContainer) }, onClick = {
+                        viewModel.dispatch(ScreenAction.Notifications.Mute)
+                    })
+                }
+            }
         })
 
         when (state.composerState) {
diff --git a/features/messenger/src/main/kotlin/app/dapk/st/messenger/state/MessengerAction.kt b/features/messenger/src/main/kotlin/app/dapk/st/messenger/state/MessengerAction.kt
index 4dc63e1..07541ca 100644
--- a/features/messenger/src/main/kotlin/app/dapk/st/messenger/state/MessengerAction.kt
+++ b/features/messenger/src/main/kotlin/app/dapk/st/messenger/state/MessengerAction.kt
@@ -10,6 +10,11 @@ sealed interface ScreenAction : Action {
     data class CopyToClipboard(val model: BubbleModel) : ScreenAction
     object SendMessage : ScreenAction
     object OpenGalleryPicker : ScreenAction
+
+    sealed interface Notifications : ScreenAction {
+        object Mute : Notifications
+        object Unmute : Notifications
+    }
 }
 
 sealed interface ComponentLifecycle : Action {
@@ -18,7 +23,8 @@ sealed interface ComponentLifecycle : Action {
 }
 
 sealed interface MessagesStateChange : Action {
-    data class Content(val content: MessengerPageState) : ComposerStateChange
+    data class Content(val content: MessengerPageState) : MessagesStateChange
+    data class MuteContent(val isMuted: Boolean) : MessagesStateChange
 }
 
 sealed interface ComposerStateChange : Action {
diff --git a/features/messenger/src/main/kotlin/app/dapk/st/messenger/state/MessengerReducer.kt b/features/messenger/src/main/kotlin/app/dapk/st/messenger/state/MessengerReducer.kt
index ef65982..0555a4d 100644
--- a/features/messenger/src/main/kotlin/app/dapk/st/messenger/state/MessengerReducer.kt
+++ b/features/messenger/src/main/kotlin/app/dapk/st/messenger/state/MessengerReducer.kt
@@ -8,6 +8,7 @@ import app.dapk.st.core.asString
 import app.dapk.st.core.extensions.takeIfContent
 import app.dapk.st.design.components.BubbleModel
 import app.dapk.st.domain.application.message.MessageOptionsStore
+import app.dapk.st.domain.room.MutedRoomsStore
 import app.dapk.st.engine.ChatEngine
 import app.dapk.st.engine.MessengerPageState
 import app.dapk.st.engine.RoomEvent
@@ -26,6 +27,7 @@ internal fun messengerReducer(
     copyToClipboard: CopyToClipboard,
     deviceMeta: DeviceMeta,
     messageOptionsStore: MessageOptionsStore,
+    mutedRoomsStore: MutedRoomsStore,
     roomId: RoomId,
     initialAttachments: List<MessageAttachment>?,
     eventEmitter: suspend (MessengerEvent) -> Unit,
@@ -36,16 +38,19 @@ internal fun messengerReducer(
             roomState = Lce.Loading(),
             composerState = initialComposerState(initialAttachments),
             viewerState = null,
+            isMuted = false,
         ),
 
         async(ComponentLifecycle::class) { action ->
             val state = getState()
             when (action) {
                 is ComponentLifecycle.Visible -> {
-                    jobBag.add("messages", chatEngine.messages(state.roomId, disableReadReceipts = messageOptionsStore.isReadReceiptsDisabled())
-                        .onEach { dispatch(MessagesStateChange.Content(it)) }
-                        .launchIn(coroutineScope)
+                    jobBag.replace(
+                        "messages", chatEngine.messages(state.roomId, disableReadReceipts = messageOptionsStore.isReadReceiptsDisabled())
+                            .onEach { dispatch(MessagesStateChange.Content(it)) }
+                            .launchIn(coroutineScope)
                     )
+                    dispatch(MessagesStateChange.MuteContent(mutedRoomsStore.isMuted(roomId)))
                 }
 
                 ComponentLifecycle.Gone -> jobBag.cancel("messages")
@@ -134,6 +139,28 @@ internal fun messengerReducer(
                 }
             }
         },
+
+        change(MessagesStateChange.MuteContent::class) { action, state ->
+            state.copy(isMuted = action.isMuted).also {
+                println("??? action - $action previous state: ${state.isMuted} next: ${it.isMuted}")
+            }
+        },
+
+        async(ScreenAction.Notifications::class) { action ->
+            when (action) {
+                ScreenAction.Notifications.Mute -> mutedRoomsStore.mute(roomId)
+                ScreenAction.Notifications.Unmute -> mutedRoomsStore.unmute(roomId)
+            }
+
+            dispatch(
+                MessagesStateChange.MuteContent(
+                    isMuted = when (action) {
+                        ScreenAction.Notifications.Mute -> true
+                        ScreenAction.Notifications.Unmute -> false
+                    }
+                )
+            )
+        },
     )
 }
 
@@ -158,7 +185,6 @@ private fun RoomEvent.toSendMessageReply() = SendMessage.TextMessage.Reply(
     timestampUtc = this.utcTimestamp,
 )
 
-
 private fun initialComposerState(initialAttachments: List<MessageAttachment>?) = initialAttachments
     ?.takeIf { it.isNotEmpty() }
     ?.let { ComposerState.Attachments(it, null) }
diff --git a/features/messenger/src/main/kotlin/app/dapk/st/messenger/state/MessengerState.kt b/features/messenger/src/main/kotlin/app/dapk/st/messenger/state/MessengerState.kt
index caeea8d..b94441d 100644
--- a/features/messenger/src/main/kotlin/app/dapk/st/messenger/state/MessengerState.kt
+++ b/features/messenger/src/main/kotlin/app/dapk/st/messenger/state/MessengerState.kt
@@ -14,7 +14,8 @@ data class MessengerScreenState(
     val roomId: RoomId,
     val roomState: Lce<MessengerPageState>,
     val composerState: ComposerState,
-    val viewerState: ViewerState?
+    val viewerState: ViewerState?,
+    val isMuted: Boolean,
 )
 
 data class ViewerState(
diff --git a/features/messenger/src/test/kotlin/app/dapk/st/messenger/MessengerReducerTest.kt b/features/messenger/src/test/kotlin/app/dapk/st/messenger/MessengerReducerTest.kt
index d061d32..efcd8f3 100644
--- a/features/messenger/src/test/kotlin/app/dapk/st/messenger/MessengerReducerTest.kt
+++ b/features/messenger/src/test/kotlin/app/dapk/st/messenger/MessengerReducerTest.kt
@@ -3,10 +3,12 @@ package app.dapk.st.messenger
 import android.os.Build
 import app.dapk.st.core.*
 import app.dapk.st.design.components.BubbleModel
+import app.dapk.st.domain.room.MutedRoomsStore
 import app.dapk.st.engine.RoomEvent
 import app.dapk.st.engine.RoomState
 import app.dapk.st.engine.SendMessage
 import app.dapk.st.matrix.common.EventId
+import app.dapk.st.matrix.common.RoomId
 import app.dapk.st.matrix.common.UserId
 import app.dapk.st.matrix.common.asString
 import app.dapk.st.messenger.state.*
@@ -14,6 +16,7 @@ import app.dapk.st.navigator.MessageAttachment
 import fake.FakeChatEngine
 import fake.FakeMessageOptionsStore
 import fixture.*
+import io.mockk.coEvery
 import io.mockk.every
 import io.mockk.mockk
 import kotlinx.coroutines.flow.flowOf
@@ -27,6 +30,7 @@ private const val READ_RECEIPTS_ARE_DISABLED = true
 private val A_ROOM_ID = aRoomId("messenger state room id")
 private const val A_MESSAGE_CONTENT = "message content"
 private val AN_EVENT_ID = anEventId("state event")
+private const val ROOM_IS_MUTED = true
 private val A_SELF_ID = aUserId("self")
 private val A_MESSENGER_PAGE_STATE = aMessengerStateWithEvent(AN_EVENT_ID, A_SELF_ID)
 private val A_MESSAGE_ATTACHMENT = MessageAttachment(AndroidUri("a-uri"), MimeType.Image)
@@ -48,6 +52,7 @@ class MessengerReducerTest {
     private val fakeChatEngine = FakeChatEngine()
     private val fakeCopyToClipboard = FakeCopyToClipboard()
     private val fakeDeviceMeta = FakeDeviceMeta()
+    private val fakeMutedRoomsStore = FakeMutedRoomsStore()
     private val fakeJobBag = FakeJobBag()
 
     private val runReducerTest = testReducer { fakeEventSource ->
@@ -57,6 +62,7 @@ class MessengerReducerTest {
             fakeCopyToClipboard.instance,
             fakeDeviceMeta.instance,
             fakeMessageOptionsStore.instance,
+            fakeMutedRoomsStore,
             A_ROOM_ID,
             emptyList(),
             fakeEventSource,
@@ -71,6 +77,7 @@ class MessengerReducerTest {
                 roomState = Lce.Loading(),
                 composerState = ComposerState.Text(value = "", reply = null),
                 viewerState = null,
+                isMuted = false,
             )
         )
     }
@@ -83,6 +90,7 @@ class MessengerReducerTest {
                 roomState = Lce.Loading(),
                 composerState = ComposerState.Text(value = "", reply = null),
                 viewerState = null,
+                isMuted = false,
             )
         )
     }
@@ -95,20 +103,22 @@ class MessengerReducerTest {
                 roomState = Lce.Loading(),
                 composerState = ComposerState.Attachments(listOf(A_MESSAGE_ATTACHMENT), reply = null),
                 viewerState = null,
+                isMuted = false,
             )
         )
     }
 
     @Test
-    fun `given messages emits state, when Visible, then dispatches content`() = runReducerTest {
-        fakeJobBag.instance.expect { it.add("messages", any()) }
+    fun `given room is muted and messages emits state, when Visible, then dispatches content and mute changes`() = runReducerTest {
+        fakeMutedRoomsStore.givenIsMuted(A_ROOM_ID).returns(ROOM_IS_MUTED)
+        fakeJobBag.instance.expect { it.replace("messages", any()) }
         fakeMessageOptionsStore.givenReadReceiptsDisabled().returns(READ_RECEIPTS_ARE_DISABLED)
         val state = aMessengerStateWithEvent(AN_EVENT_ID, A_SELF_ID)
         fakeChatEngine.givenMessages(A_ROOM_ID, READ_RECEIPTS_ARE_DISABLED).returns(flowOf(state))
 
         reduce(ComponentLifecycle.Visible)
 
-        assertOnlyDispatches(listOf(MessagesStateChange.Content(state)))
+        assertOnlyDispatches(listOf(MessagesStateChange.MuteContent(isMuted = ROOM_IS_MUTED), MessagesStateChange.Content(state)))
     }
 
     @Test
@@ -330,6 +340,7 @@ class MessengerReducerTest {
             fakeCopyToClipboard.instance,
             fakeDeviceMeta.instance,
             fakeMessageOptionsStore.instance,
+            FakeMutedRoomsStore(),
             A_ROOM_ID,
             initialAttachments = initialAttachments,
             fakeEventSource,
@@ -359,4 +370,8 @@ class FakeDeviceMeta {
     val instance = mockk<DeviceMeta>()
 
     fun givenApiVersion() = every { instance.apiVersion }.delegateReturn()
-}
\ No newline at end of file
+}
+
+class FakeMutedRoomsStore : MutedRoomsStore by mockk() {
+    fun givenIsMuted(roomId: RoomId) = coEvery { isMuted(roomId) }.delegateReturn()
+}
diff --git a/test-harness/src/test/kotlin/test/impl/InMemoryPreferences.kt b/test-harness/src/test/kotlin/test/impl/InMemoryPreferences.kt
index 9818819..b6ec8ca 100644
--- a/test-harness/src/test/kotlin/test/impl/InMemoryPreferences.kt
+++ b/test-harness/src/test/kotlin/test/impl/InMemoryPreferences.kt
@@ -1,18 +1,31 @@
 package test.impl
 
 import app.dapk.st.core.Preferences
-import test.unit
 
 class InMemoryPreferences : Preferences {
 
     private val prefs = mutableMapOf<String, String>()
+    private val setPrefs = mutableMapOf<String, Set<String>>()
 
     override suspend fun store(key: String, value: String) {
         prefs[key] = value
     }
 
+    override suspend fun store(key: String, value: Set<String>) {
+        setPrefs[key] = value
+    }
+
     override suspend fun readString(key: String): String? = prefs[key]
-    override suspend fun remove(key: String) = prefs.remove(key).unit()
-    override suspend fun clear() = prefs.clear()
+    override suspend fun readStrings(key: String): Set<String>? = setPrefs[key]
+    
+    override suspend fun remove(key: String) {
+        prefs.remove(key)
+        setPrefs.remove(key)
+    }
+
+    override suspend fun clear() {
+        prefs.clear()
+        setPrefs.clear()
+    }
 
 }
\ No newline at end of file