diff --git a/changelog.d/7335.misc b/changelog.d/7335.misc
new file mode 100644
index 0000000000..3b14aa1339
--- /dev/null
+++ b/changelog.d/7335.misc
@@ -0,0 +1 @@
+Dependency to arrow has been removed. Please use `org.matrix.android.sdk.api.util.Optional` instead.
diff --git a/dependencies.gradle b/dependencies.gradle
index 359cf577ef..927e243298 100644
--- a/dependencies.gradle
+++ b/dependencies.gradle
@@ -14,7 +14,6 @@ def kotlinCoroutines = "1.6.4"
 def dagger = "2.44"
 def appDistribution = "16.0.0-beta04"
 def retrofit = "2.9.0"
-def arrow = "0.8.2"
 def markwon = "4.6.2"
 def moshi = "1.14.0"
 def lifecycle = "2.5.1"
@@ -114,10 +113,6 @@ ext.libs = [
         rx          : [
                 'rxKotlin'               : "io.reactivex.rxjava2:rxkotlin:2.4.0"
         ],
-        arrow       : [
-                'core'                   : "io.arrow-kt:arrow-core:$arrow",
-                'instances'              : "io.arrow-kt:arrow-instances-core:$arrow"
-        ],
         markwon     : [
                 'core'                   : "io.noties.markwon:core:$markwon",
                 'extLatex'               : "io.noties.markwon:ext-latex:$markwon",
diff --git a/dependencies_groups.gradle b/dependencies_groups.gradle
index 991d54d9af..1c1fd8e32e 100644
--- a/dependencies_groups.gradle
+++ b/dependencies_groups.gradle
@@ -134,7 +134,6 @@ ext.groups = [
                         'commons-io',
                         'commons-logging',
                         'info.picocli',
-                        'io.arrow-kt',
                         'io.element.android',
                         'io.github.davidburstrom.contester',
                         'io.github.detekt.sarif4k',
diff --git a/matrix-sdk-android/src/main/java/org/matrix/android/sdk/api/util/Optional.kt b/matrix-sdk-android/src/main/java/org/matrix/android/sdk/api/util/Optional.kt
index 42724746c0..2da6d4cbf8 100644
--- a/matrix-sdk-android/src/main/java/org/matrix/android/sdk/api/util/Optional.kt
+++ b/matrix-sdk-android/src/main/java/org/matrix/android/sdk/api/util/Optional.kt
@@ -15,15 +15,13 @@
  */
 package org.matrix.android.sdk.api.util
 
-data class Optional<T : Any> constructor(private val value: T?) {
+data class Optional<T : Any>(private val value: T?) {
 
-    fun get(): T {
-        return value!!
-    }
+    fun get(): T = value!!
 
-    fun getOrNull(): T? {
-        return value
-    }
+    fun orNull(): T? = value
+
+    fun getOrNull(): T? = value
 
     fun <U : Any> map(fn: (T) -> U?): Optional<U> {
         return if (value == null) {
@@ -33,23 +31,19 @@ data class Optional<T : Any> constructor(private val value: T?) {
         }
     }
 
-    fun getOrElse(fn: () -> T): T {
+    fun orElse(fn: () -> T): T {
         return value ?: fn()
     }
 
-    fun hasValue(): Boolean {
-        return value != null
-    }
+    fun hasValue(): Boolean = value != null
 
     companion object {
-        fun <T : Any> from(value: T?): Optional<T> {
-            return Optional(value)
-        }
+        fun <T : Any> from(value: T?): Optional<T> = Optional(value)
 
-        fun <T : Any> empty(): Optional<T> {
-            return Optional(null)
-        }
+        fun <T : Any> empty(): Optional<T> = Optional(null)
     }
 }
 
+fun <T : Any> T?.toOption() = Optional(this)
+
 fun <T : Any> T?.toOptional() = Optional(this)
diff --git a/vector/build.gradle b/vector/build.gradle
index 76f32a34db..be79828ea5 100644
--- a/vector/build.gradle
+++ b/vector/build.gradle
@@ -170,9 +170,6 @@ dependencies {
     // Paging
     implementation libs.androidx.pagingRuntimeKtx
 
-    // Functional Programming
-    implementation libs.arrow.core
-
     // Pref
     api libs.androidx.preferenceKtx
 
diff --git a/vector/src/main/java/im/vector/app/ActiveSessionDataSource.kt b/vector/src/main/java/im/vector/app/ActiveSessionDataSource.kt
index f58c685ab9..98d6ee7a0a 100644
--- a/vector/src/main/java/im/vector/app/ActiveSessionDataSource.kt
+++ b/vector/src/main/java/im/vector/app/ActiveSessionDataSource.kt
@@ -17,11 +17,11 @@
 
 package im.vector.app
 
-import arrow.core.Option
 import im.vector.app.core.utils.BehaviorDataSource
 import org.matrix.android.sdk.api.session.Session
+import org.matrix.android.sdk.api.util.Optional
 import javax.inject.Inject
 import javax.inject.Singleton
 
 @Singleton
-class ActiveSessionDataSource @Inject constructor() : BehaviorDataSource<Option<Session>>()
+class ActiveSessionDataSource @Inject constructor() : BehaviorDataSource<Optional<Session>>()
diff --git a/vector/src/main/java/im/vector/app/SpaceStateHandler.kt b/vector/src/main/java/im/vector/app/SpaceStateHandler.kt
index 64b6fc4e8b..efa72a0161 100644
--- a/vector/src/main/java/im/vector/app/SpaceStateHandler.kt
+++ b/vector/src/main/java/im/vector/app/SpaceStateHandler.kt
@@ -17,10 +17,10 @@
 package im.vector.app
 
 import androidx.lifecycle.DefaultLifecycleObserver
-import arrow.core.Option
 import kotlinx.coroutines.flow.Flow
 import org.matrix.android.sdk.api.session.Session
 import org.matrix.android.sdk.api.session.room.model.RoomSummary
+import org.matrix.android.sdk.api.util.Optional
 
 /**
  * Gets info about the current space the user has navigated to, any space backstack they may have
@@ -62,7 +62,7 @@ interface SpaceStateHandler : DefaultLifecycleObserver {
     /**
      * Gets a flow of the selected space for clients to react immediately to space changes.
      */
-    fun getSelectedSpaceFlow(): Flow<Option<RoomSummary>>
+    fun getSelectedSpaceFlow(): Flow<Optional<RoomSummary>>
 
     /**
      * Gets the id of the active space, or null if there is none.
diff --git a/vector/src/main/java/im/vector/app/SpaceStateHandlerImpl.kt b/vector/src/main/java/im/vector/app/SpaceStateHandlerImpl.kt
index d230e76c1e..2c00d03014 100644
--- a/vector/src/main/java/im/vector/app/SpaceStateHandlerImpl.kt
+++ b/vector/src/main/java/im/vector/app/SpaceStateHandlerImpl.kt
@@ -17,7 +17,6 @@
 package im.vector.app
 
 import androidx.lifecycle.LifecycleOwner
-import arrow.core.Option
 import im.vector.app.core.di.ActiveSessionHolder
 import im.vector.app.core.utils.BehaviorDataSource
 import im.vector.app.features.analytics.AnalyticsTracker
@@ -42,6 +41,8 @@ import org.matrix.android.sdk.api.session.getRoom
 import org.matrix.android.sdk.api.session.getRoomSummary
 import org.matrix.android.sdk.api.session.room.model.RoomSummary
 import org.matrix.android.sdk.api.session.sync.SyncRequestState
+import org.matrix.android.sdk.api.util.Optional
+import org.matrix.android.sdk.api.util.toOption
 import javax.inject.Inject
 import javax.inject.Singleton
 
@@ -59,7 +60,7 @@ class SpaceStateHandlerImpl @Inject constructor(
 ) : SpaceStateHandler {
 
     private val coroutineScope = CoroutineScope(SupervisorJob() + Dispatchers.Main)
-    private val selectedSpaceDataSource = BehaviorDataSource<Option<RoomSummary>>(Option.empty())
+    private val selectedSpaceDataSource = BehaviorDataSource<Optional<RoomSummary>>(Optional.empty())
     private val selectedSpaceFlow = selectedSpaceDataSource.stream()
 
     override fun getCurrentSpace(): RoomSummary? {
@@ -98,11 +99,7 @@ class SpaceStateHandlerImpl @Inject constructor(
             uiStateRepository.storeSelectedSpace(spaceToSet?.roomId, activeSession.sessionId)
         }
 
-        if (spaceToSet == null) {
-            selectedSpaceDataSource.post(Option.empty())
-        } else {
-            selectedSpaceDataSource.post(Option.just(spaceToSet))
-        }
+        selectedSpaceDataSource.post(spaceToSet.toOption())
 
         if (spaceId != null) {
             activeSession.coroutineScope.launch(Dispatchers.IO) {
diff --git a/vector/src/main/java/im/vector/app/core/di/ActiveSessionHolder.kt b/vector/src/main/java/im/vector/app/core/di/ActiveSessionHolder.kt
index 3f0507305a..64111d2fa1 100644
--- a/vector/src/main/java/im/vector/app/core/di/ActiveSessionHolder.kt
+++ b/vector/src/main/java/im/vector/app/core/di/ActiveSessionHolder.kt
@@ -17,7 +17,6 @@
 package im.vector.app.core.di
 
 import android.content.Context
-import arrow.core.Option
 import im.vector.app.ActiveSessionDataSource
 import im.vector.app.core.extensions.configureAndStart
 import im.vector.app.core.extensions.startSyncing
@@ -31,6 +30,8 @@ import im.vector.app.features.session.SessionListener
 import kotlinx.coroutines.runBlocking
 import org.matrix.android.sdk.api.auth.AuthenticationService
 import org.matrix.android.sdk.api.session.Session
+import org.matrix.android.sdk.api.util.Optional
+import org.matrix.android.sdk.api.util.toOption
 import timber.log.Timber
 import java.util.concurrent.atomic.AtomicReference
 import javax.inject.Inject
@@ -57,7 +58,7 @@ class ActiveSessionHolder @Inject constructor(
     fun setActiveSession(session: Session) {
         Timber.w("setActiveSession of ${session.myUserId}")
         activeSessionReference.set(session)
-        activeSessionDataSource.post(Option.just(session))
+        activeSessionDataSource.post(session.toOption())
 
         keyRequestHandler.start(session)
         incomingVerificationRequestHandler.start(session)
@@ -77,7 +78,7 @@ class ActiveSessionHolder @Inject constructor(
         }
 
         activeSessionReference.set(null)
-        activeSessionDataSource.post(Option.empty())
+        activeSessionDataSource.post(Optional.empty())
 
         keyRequestHandler.stop()
         incomingVerificationRequestHandler.stop()
diff --git a/vector/src/main/java/im/vector/app/core/files/FileSaver.kt b/vector/src/main/java/im/vector/app/core/files/FileSaver.kt
index 7de5286854..c595bb2693 100644
--- a/vector/src/main/java/im/vector/app/core/files/FileSaver.kt
+++ b/vector/src/main/java/im/vector/app/core/files/FileSaver.kt
@@ -24,7 +24,6 @@ import android.os.Build
 import android.provider.MediaStore
 import androidx.annotation.WorkerThread
 import androidx.core.content.getSystemService
-import arrow.core.Try
 import okio.buffer
 import okio.sink
 import okio.source
@@ -35,11 +34,10 @@ import java.io.File
  * Save a string to a file with Okio.
  */
 @WorkerThread
-fun writeToFile(str: String, file: File): Try<Unit> {
-    return Try<Unit> {
-        file.sink().buffer().use {
-            it.writeString(str, Charsets.UTF_8)
-        }
+@Throws
+fun writeToFile(str: String, file: File) {
+    file.sink().buffer().use {
+        it.writeString(str, Charsets.UTF_8)
     }
 }
 
@@ -47,11 +45,10 @@ fun writeToFile(str: String, file: File): Try<Unit> {
  * Save a byte array to a file with Okio.
  */
 @WorkerThread
-fun writeToFile(data: ByteArray, file: File): Try<Unit> {
-    return Try<Unit> {
-        file.sink().buffer().use {
-            it.write(data)
-        }
+@Throws
+fun writeToFile(data: ByteArray, file: File) {
+    file.sink().buffer().use {
+        it.write(data)
     }
 }
 
diff --git a/vector/src/main/java/im/vector/app/features/crypto/keysbackup/setup/KeysBackupSetupStep3Fragment.kt b/vector/src/main/java/im/vector/app/features/crypto/keysbackup/setup/KeysBackupSetupStep3Fragment.kt
index 7e0fb7e417..c70c5d979e 100644
--- a/vector/src/main/java/im/vector/app/features/crypto/keysbackup/setup/KeysBackupSetupStep3Fragment.kt
+++ b/vector/src/main/java/im/vector/app/features/crypto/keysbackup/setup/KeysBackupSetupStep3Fragment.kt
@@ -25,7 +25,6 @@ import android.widget.TextView
 import android.widget.Toast
 import androidx.core.view.isVisible
 import androidx.lifecycle.lifecycleScope
-import arrow.core.Try
 import com.google.android.material.bottomsheet.BottomSheetDialog
 import com.google.android.material.dialog.MaterialAlertDialogBuilder
 import dagger.hilt.android.AndroidEntryPoint
@@ -167,7 +166,7 @@ class KeysBackupSetupStep3Fragment :
 
     private fun exportRecoveryKeyToFile(uri: Uri, data: String) {
         lifecycleScope.launch(Dispatchers.Main) {
-            Try {
+            try {
                 withContext(Dispatchers.IO) {
                     requireContext().safeOpenOutputStream(uri)
                             ?.use { os ->
@@ -176,24 +175,19 @@ class KeysBackupSetupStep3Fragment :
                             }
                 }
                         ?: throw IOException("Unable to write the file")
+                viewModel.copyHasBeenMade = true
+                activity?.let {
+                    MaterialAlertDialogBuilder(it)
+                            .setTitle(R.string.dialog_title_success)
+                            .setMessage(R.string.recovery_key_export_saved)
+                }
+            } catch (throwable: Throwable) {
+                activity?.let {
+                    MaterialAlertDialogBuilder(it)
+                            .setTitle(R.string.dialog_title_error)
+                            .setMessage(errorFormatter.toHumanReadable(throwable))
+                }
             }
-                    .fold(
-                            { throwable ->
-                                activity?.let {
-                                    MaterialAlertDialogBuilder(it)
-                                            .setTitle(R.string.dialog_title_error)
-                                            .setMessage(errorFormatter.toHumanReadable(throwable))
-                                }
-                            },
-                            {
-                                viewModel.copyHasBeenMade = true
-                                activity?.let {
-                                    MaterialAlertDialogBuilder(it)
-                                            .setTitle(R.string.dialog_title_success)
-                                            .setMessage(R.string.recovery_key_export_saved)
-                                }
-                            }
-                    )
                     ?.setCancelable(false)
                     ?.setPositiveButton(R.string.ok, null)
                     ?.show()
diff --git a/vector/src/main/java/im/vector/app/features/home/room/list/home/HomeRoomListViewModel.kt b/vector/src/main/java/im/vector/app/features/home/room/list/home/HomeRoomListViewModel.kt
index 33b293497e..f358601399 100644
--- a/vector/src/main/java/im/vector/app/features/home/room/list/home/HomeRoomListViewModel.kt
+++ b/vector/src/main/java/im/vector/app/features/home/room/list/home/HomeRoomListViewModel.kt
@@ -21,7 +21,6 @@ import androidx.lifecycle.LiveData
 import androidx.lifecycle.MutableLiveData
 import androidx.lifecycle.Observer
 import androidx.paging.PagedList
-import arrow.core.toOption
 import com.airbnb.mvrx.MavericksViewModelFactory
 import dagger.assisted.Assisted
 import dagger.assisted.AssistedFactory
@@ -68,6 +67,7 @@ import org.matrix.android.sdk.api.session.room.roomSummaryQueryParams
 import org.matrix.android.sdk.api.session.room.state.isPublic
 import org.matrix.android.sdk.api.util.Optional
 import org.matrix.android.sdk.api.util.toMatrixItem
+import org.matrix.android.sdk.api.util.toOption
 import org.matrix.android.sdk.flow.flow
 
 class HomeRoomListViewModel @AssistedInject constructor(
diff --git a/vector/src/test/java/im/vector/app/test/fakes/FakeActiveSessionDataSource.kt b/vector/src/test/java/im/vector/app/test/fakes/FakeActiveSessionDataSource.kt
index 4dab6daf3b..938607017f 100644
--- a/vector/src/test/java/im/vector/app/test/fakes/FakeActiveSessionDataSource.kt
+++ b/vector/src/test/java/im/vector/app/test/fakes/FakeActiveSessionDataSource.kt
@@ -16,15 +16,15 @@
 
 package im.vector.app.test.fakes
 
-import arrow.core.Option
 import im.vector.app.ActiveSessionDataSource
 import org.matrix.android.sdk.api.session.Session
+import org.matrix.android.sdk.api.util.toOptional
 
 class FakeActiveSessionDataSource {
 
     val instance = ActiveSessionDataSource()
 
     fun setActiveSession(session: Session) {
-        instance.post(Option.just(session))
+        instance.post(session.toOptional())
     }
 }