diff --git a/app/build.gradle.kts b/app/build.gradle.kts
index 80c8eeb..a8319b7 100644
--- a/app/build.gradle.kts
+++ b/app/build.gradle.kts
@@ -139,6 +139,9 @@ dependencies {
     implementation(libs.coil.compose)
     implementation(libs.lottie.compose)
 
+    // Datastore
+    implementation(libs.datastore.preferences)
+
     // Unit Test
     testImplementation(libs.junit)
     testImplementation(libs.mockk)
diff --git a/app/src/main/kotlin/com/whereismymotivation/WimmApplication.kt b/app/src/main/kotlin/com/whereismymotivation/WimmApplication.kt
index cca2f47..cb33443 100644
--- a/app/src/main/kotlin/com/whereismymotivation/WimmApplication.kt
+++ b/app/src/main/kotlin/com/whereismymotivation/WimmApplication.kt
@@ -9,6 +9,9 @@ import com.whereismymotivation.init.FirebaseInit
 import com.whereismymotivation.init.MetricInit
 import com.whereismymotivation.init.WorkInit
 import dagger.hilt.android.HiltAndroidApp
+import kotlinx.coroutines.DelicateCoroutinesApi
+import kotlinx.coroutines.GlobalScope
+import kotlinx.coroutines.launch
 import javax.inject.Inject
 
 @HiltAndroidApp
@@ -42,12 +45,15 @@ class WimmApplication : Application(), Configuration.Provider {
             .setWorkerFactory(workerFactory)
             .build()
 
+    @OptIn(DelicateCoroutinesApi::class)
     override fun onCreate() {
         super.onCreate()
         tracker.trackAppOpen()
-        metricInit.init()
-        workInit.init()
-        firebaseInit.init()
-        coilInit.init()
+        GlobalScope.launch {
+            metricInit.init()
+            workInit.init()
+            firebaseInit.init()
+            coilInit.init()
+        }
     }
 }
\ No newline at end of file
diff --git a/app/src/main/kotlin/com/whereismymotivation/data/local/prefs/AppMetricPreferences.kt b/app/src/main/kotlin/com/whereismymotivation/data/local/prefs/AppMetricPreferences.kt
index 6537a51..38992d9 100755
--- a/app/src/main/kotlin/com/whereismymotivation/data/local/prefs/AppMetricPreferences.kt
+++ b/app/src/main/kotlin/com/whereismymotivation/data/local/prefs/AppMetricPreferences.kt
@@ -1,48 +1,52 @@
 package com.whereismymotivation.data.local.prefs
 
-import android.content.SharedPreferences
+import androidx.datastore.core.DataStore
+import androidx.datastore.preferences.core.Preferences
+import androidx.datastore.preferences.core.booleanPreferencesKey
+import androidx.datastore.preferences.core.edit
+import androidx.datastore.preferences.core.intPreferencesKey
+import androidx.datastore.preferences.core.longPreferencesKey
+import kotlinx.coroutines.flow.first
+import kotlinx.coroutines.flow.map
 import javax.inject.Inject
 import javax.inject.Singleton
 
 @Singleton
-class AppMetricPreferences @Inject constructor(private val prefs: SharedPreferences) {
+class AppMetricPreferences @Inject constructor(private val dataStore: DataStore<Preferences>) {
 
     companion object {
-
-        private const val CURRENT_APP_VERSION = "PREF_KEY_CURRENT_APP_VERSION"
-
-        private const val DAILY_RECORD_ALARM_TIME_HOUR = "PREF_KEY_DAILY_RECORD_ALARM_TIME_HOUR"
-        private const val DAILY_RECORD_ALARM_TIME_MIN = "PREF_KEY_DAILY_RECORD_ALARM_TIME_MIN"
-        private const val DAILY_RECORD_ALARM_TIME_SEC = "PREF_KEY_DAILY_RECORD_ALARM_TIME_SEC"
-
-        private const val DAILY_MOOD_RECORDER_NOTIFICATION =
-            "PREF_KEY_DAILY_MOOD_RECORDER_NOTIFICATION"
-
+        private val CURRENT_APP_VERSION = longPreferencesKey("CURRENT_APP_VERSION")
+        private val DAILY_RECORD_ALARM_TIME_HOUR = intPreferencesKey("DAILY_RECORD_ALARM_TIME_HOUR")
+        private val DAILY_RECORD_ALARM_TIME_MIN = intPreferencesKey("DAILY_RECORD_ALARM_TIME_MIN")
+        private val DAILY_RECORD_ALARM_TIME_SEC = intPreferencesKey("DAILY_RECORD_ALARM_TIME_SEC")
+        private val DAILY_MOOD_RECORDER_NOTIFICATION =
+            booleanPreferencesKey("DAILY_MOOD_RECORDER_NOTIFICATION")
     }
 
-    fun setCurrentAppVersion(appVersion: Long) =
-        prefs.edit().putLong(CURRENT_APP_VERSION, appVersion).apply()
+    suspend fun setCurrentAppVersion(appVersion: Long) {
+        dataStore.edit { it[CURRENT_APP_VERSION] = appVersion }
+    }
 
-    fun getCurrentAppVersion(): Long =
-        prefs.getLong(CURRENT_APP_VERSION, 0)
+    suspend fun getCurrentAppVersion() =
+        dataStore.data.map { it[CURRENT_APP_VERSION] ?: 0 }.first()
 
-    fun setDailyRecordAlarmTime(hour: Int, min: Int, sec: Int) {
-        prefs.edit().putInt(DAILY_RECORD_ALARM_TIME_HOUR, hour).apply()
-        prefs.edit().putInt(DAILY_RECORD_ALARM_TIME_MIN, min).apply()
-        prefs.edit().putInt(DAILY_RECORD_ALARM_TIME_SEC, sec).apply()
+    suspend fun setDailyRecordAlarmTime(hour: Int, min: Int, sec: Int) {
+        dataStore.edit { it[DAILY_RECORD_ALARM_TIME_HOUR] = hour }
+        dataStore.edit { it[DAILY_RECORD_ALARM_TIME_MIN] = min }
+        dataStore.edit { it[DAILY_RECORD_ALARM_TIME_SEC] = sec }
     }
 
-    fun getDailyRecordAlarmTime(): Triple<Int, Int, Int> {
-        val hour = prefs.getInt(DAILY_RECORD_ALARM_TIME_HOUR, 20) // 8PM
-        val min = prefs.getInt(DAILY_RECORD_ALARM_TIME_MIN, 0)
-        val sec = prefs.getInt(DAILY_RECORD_ALARM_TIME_SEC, 0)
+    suspend fun getDailyRecordAlarmTime(): Triple<Int, Int, Int> {
+        val hour = dataStore.data.map { it[DAILY_RECORD_ALARM_TIME_HOUR] ?: 22 }.first() // 8PM
+        val min = dataStore.data.map { it[DAILY_RECORD_ALARM_TIME_MIN] ?: 34 }.first()
+        val sec = dataStore.data.map { it[DAILY_RECORD_ALARM_TIME_SEC] ?: 0 }.first()
         return Triple(hour, min, sec)
     }
 
-    fun setDailyMoodRecorderNotificationEnable(enable: Boolean) =
-        prefs.edit().putBoolean(DAILY_MOOD_RECORDER_NOTIFICATION, enable).apply()
-
-    fun getDailyMoodRecorderNotificationEnable() =
-        prefs.getBoolean(DAILY_MOOD_RECORDER_NOTIFICATION, true)
+    suspend fun setDailyMoodRecorderNotificationEnable(enable: Boolean) {
+        dataStore.edit { it[DAILY_MOOD_RECORDER_NOTIFICATION] = enable }
+    }
 
+    suspend fun getDailyMoodRecorderNotificationEnable() =
+        dataStore.data.map { it[DAILY_MOOD_RECORDER_NOTIFICATION] ?: true }.first()
 }
\ No newline at end of file
diff --git a/app/src/main/kotlin/com/whereismymotivation/data/local/prefs/ContentPreferences.kt b/app/src/main/kotlin/com/whereismymotivation/data/local/prefs/ContentPreferences.kt
index ffb4167..cae6b96 100755
--- a/app/src/main/kotlin/com/whereismymotivation/data/local/prefs/ContentPreferences.kt
+++ b/app/src/main/kotlin/com/whereismymotivation/data/local/prefs/ContentPreferences.kt
@@ -1,24 +1,32 @@
 package com.whereismymotivation.data.local.prefs
 
-import android.content.SharedPreferences
+import androidx.datastore.core.DataStore
+import androidx.datastore.preferences.core.Preferences
+import androidx.datastore.preferences.core.edit
+import androidx.datastore.preferences.core.intPreferencesKey
+import androidx.datastore.preferences.core.longPreferencesKey
+import kotlinx.coroutines.flow.first
+import kotlinx.coroutines.flow.map
 import javax.inject.Inject
 
-class ContentPreferences @Inject constructor(private val prefs: SharedPreferences) {
+class ContentPreferences @Inject constructor(private val dataStore: DataStore<Preferences>) {
 
     companion object {
-        private const val FEED_NEXT_PAGE_NUMBER = "FEED_NEXT_PAGE_NUMBER"
-        private const val FEED_LAST_SEEN = "FEED_LAST_SEEN"
+        private val FEED_NEXT_PAGE_NUMBER = intPreferencesKey("FEED_NEXT_PAGE_NUMBER")
+        private val FEED_LAST_SEEN = longPreferencesKey("FEED_LAST_SEEN")
     }
 
-    fun getFeedNextPageNumber(): Int =
-        prefs.getInt(FEED_NEXT_PAGE_NUMBER, 1)
+    suspend fun getFeedNextPageNumber() =
+        dataStore.data.map { it[FEED_NEXT_PAGE_NUMBER] ?: 1 }.first()
 
-    fun setFeedNextPageNumber(pageNumber: Int) =
-        prefs.edit().putInt(FEED_NEXT_PAGE_NUMBER, pageNumber).apply()
+    suspend fun setFeedNextPageNumber(pageNumber: Int) {
+        dataStore.edit { it[FEED_NEXT_PAGE_NUMBER] = pageNumber }
+    }
 
-    fun getFeedLastSeen(): Long =
-        prefs.getLong(FEED_LAST_SEEN, System.currentTimeMillis())
+    suspend fun getFeedLastSeen() =
+        dataStore.data.map { it[FEED_LAST_SEEN] ?: System.currentTimeMillis() }.first()
 
-    fun setFeedLastSeen(time: Long) =
-        prefs.edit().putLong(FEED_LAST_SEEN, time).apply()
+    suspend fun setFeedLastSeen(time: Long) {
+        dataStore.edit { it[FEED_LAST_SEEN] = time }
+    }
 }
\ No newline at end of file
diff --git a/app/src/main/kotlin/com/whereismymotivation/data/local/prefs/UserPreferences.kt b/app/src/main/kotlin/com/whereismymotivation/data/local/prefs/UserPreferences.kt
index 295a1b5..8b8935f 100755
--- a/app/src/main/kotlin/com/whereismymotivation/data/local/prefs/UserPreferences.kt
+++ b/app/src/main/kotlin/com/whereismymotivation/data/local/prefs/UserPreferences.kt
@@ -1,114 +1,136 @@
 package com.whereismymotivation.data.local.prefs
 
-import android.content.SharedPreferences
+import androidx.datastore.core.DataStore
+import androidx.datastore.preferences.core.Preferences
+import androidx.datastore.preferences.core.booleanPreferencesKey
+import androidx.datastore.preferences.core.edit
+import androidx.datastore.preferences.core.stringPreferencesKey
+import kotlinx.coroutines.flow.first
+import kotlinx.coroutines.flow.map
 import javax.inject.Inject
 import javax.inject.Singleton
 
 @Singleton
-class UserPreferences @Inject constructor(private val prefs: SharedPreferences) {
+class UserPreferences @Inject constructor(private val dataStore: DataStore<Preferences>) {
 
     companion object {
-        private const val ON_BOARDING_COMPLETED = "PREF_KEY_USER_ON_BOARDING_COMPLETED"
-        private const val USER_ID = "PREF_KEY_USER_ID"
-        private const val USER_NAME = "PREF_KEY_USER_NAME"
-        private const val USER_EMAIL = "PREF_KEY_USER_EMAIL"
-        private const val USER_PROFILE_PIC_URL = "USER_PROFILE_PIC_URL"
-        private const val ACCESS_TOKEN = "PREF_KEY_ACCESS_TOKEN"
-        private const val REFRESH_TOKEN = "PREF_KEY_REFRESH_TOKEN"
-        private const val DEVICE_ID = "PREF_KEY_DEVICE_ID"
-        private const val USER_ROLES = "PREF_KEY_USER_ROLES"
-        private const val FIREBASE_TOKEN = "FIREBASE_TOKEN"
-        private const val FIREBASE_TOKEN_SENT = "FIREBASE_TOKEN_SENT"
+        private val ON_BOARDING_COMPLETED = booleanPreferencesKey("ON_BOARDING_COMPLETED")
+        private val USER_ID = stringPreferencesKey("USER_ID")
+        private val USER_NAME = stringPreferencesKey("USER_NAME")
+        private val USER_EMAIL = stringPreferencesKey("USER_EMAIL")
+        private val USER_PROFILE_PIC_URL = stringPreferencesKey("USER_PROFILE_PIC_URL")
+        private val ACCESS_TOKEN = stringPreferencesKey("ACCESS_TOKEN")
+        private val REFRESH_TOKEN = stringPreferencesKey("REFRESH_TOKEN")
+        private val DEVICE_ID = stringPreferencesKey("DEVICE_ID")
+        private val USER_ROLES = stringPreferencesKey("USER_ROLES")
+        private val FIREBASE_TOKEN = stringPreferencesKey("FIREBASE_TOKEN")
+        private val FIREBASE_TOKEN_SENT = booleanPreferencesKey("FIREBASE_TOKEN_SENT")
     }
 
-    fun getUserId(): String? =
-        prefs.getString(USER_ID, null)
+    suspend fun getUserId() = dataStore.data.map { it[USER_ID] }.first()
 
-    fun setUserId(userId: String) =
-        prefs.edit().putString(USER_ID, userId).apply()
+    suspend fun setUserId(userId: String) {
+        dataStore.edit { it[USER_ID] = userId }
+    }
 
-    fun removeUserId() =
-        prefs.edit().remove(USER_ID).apply()
+    suspend fun removeUserId() {
+        dataStore.edit { it.remove(USER_ID) }
+    }
 
-    fun getUserName(): String? =
-        prefs.getString(USER_NAME, null)
+    suspend fun getUserName() = dataStore.data.map { it[USER_NAME] }.first()
 
-    fun setUserName(userName: String) =
-        prefs.edit().putString(USER_NAME, userName).apply()
+    suspend fun setUserName(userName: String) {
+        dataStore.edit { it[USER_NAME] = userName }
+    }
 
-    fun removeUserName() =
-        prefs.edit().remove(USER_NAME).apply()
+    suspend fun removeUserName() {
+        dataStore.edit { it.remove(USER_NAME) }
+    }
 
-    fun getUserEmail(): String? =
-        prefs.getString(USER_EMAIL, null)
+    suspend fun getUserEmail() = dataStore.data.map { it[USER_EMAIL] }.first()
 
-    fun setUserEmail(email: String) =
-        prefs.edit().putString(USER_EMAIL, email).apply()
+    suspend fun setUserEmail(email: String) {
+        dataStore.edit { it[USER_EMAIL] = email }
+    }
 
-    fun removeUserEmail() =
-        prefs.edit().remove(USER_EMAIL).apply()
+    suspend fun removeUserEmail() {
+        dataStore.edit { it.remove(USER_EMAIL) }
+    }
 
-    fun getUserProfilePicUrlUrl(): String? =
-        prefs.getString(USER_PROFILE_PIC_URL, null)
+    suspend fun getUserProfilePicUrlUrl() = dataStore.data.map { it[USER_PROFILE_PIC_URL] }.first()
 
-    fun setUserProfileProfilePicUrl(url: String?) =
-        prefs.edit().putString(USER_PROFILE_PIC_URL, url).apply()
+    suspend fun setUserProfileProfilePicUrl(url: String?) {
+        url?.let {
+            dataStore.edit { it[USER_PROFILE_PIC_URL] = url }
+        } ?: removeUserProfilePicUrl()
+    }
 
-    fun removeUserProfilePicUrl() =
-        prefs.edit().remove(USER_PROFILE_PIC_URL).apply()
+    suspend fun removeUserProfilePicUrl() {
+        dataStore.edit { it.remove(USER_PROFILE_PIC_URL) }
+    }
 
-    fun getAccessToken(): String? =
-        prefs.getString(ACCESS_TOKEN, null)
+    suspend fun getAccessToken() = dataStore.data.map { it[ACCESS_TOKEN] }.first()
 
-    fun setAccessToken(token: String) =
-        prefs.edit().putString(ACCESS_TOKEN, token).apply()
+    suspend fun setAccessToken(token: String) {
+        dataStore.edit { it[ACCESS_TOKEN] = token }
+    }
 
-    fun removeAccessToken() =
-        prefs.edit().remove(ACCESS_TOKEN).apply()
+    suspend fun removeAccessToken() {
+        dataStore.edit { it.remove(ACCESS_TOKEN) }
+    }
 
-    fun getRefreshToken(): String? =
-        prefs.getString(REFRESH_TOKEN, null)
+    suspend fun getRefreshToken() = dataStore.data.map { it[REFRESH_TOKEN] }.first()
 
-    fun setRefreshToken(token: String) =
-        prefs.edit().putString(REFRESH_TOKEN, token).apply()
+    suspend fun setRefreshToken(token: String) {
+        dataStore.edit { it[REFRESH_TOKEN] = token }
+    }
 
-    fun removeRefreshToken() =
-        prefs.edit().remove(REFRESH_TOKEN).apply()
+    suspend fun removeRefreshToken() {
+        dataStore.edit { it.remove(REFRESH_TOKEN) }
+    }
 
-    fun getOnBoardingComplete(): Boolean =
-        prefs.getBoolean(ON_BOARDING_COMPLETED, false)
+    suspend fun getOnBoardingComplete() =
+        dataStore.data.map { it[ON_BOARDING_COMPLETED] }.first() ?: false
 
-    fun setOnBoardingComplete(complete: Boolean) =
-        prefs.edit().putBoolean(ON_BOARDING_COMPLETED, complete).apply()
+    suspend fun setOnBoardingComplete(complete: Boolean) {
+        dataStore.edit { it[ON_BOARDING_COMPLETED] = complete }
+    }
 
-    fun removeOnBoardingComplete() =
-        prefs.edit().remove(ON_BOARDING_COMPLETED).apply()
+    suspend fun removeOnBoardingComplete() {
+        dataStore.edit { it.remove(ON_BOARDING_COMPLETED) }
+    }
 
-    fun getDeviceId(): String? =
-        prefs.getString(DEVICE_ID, null)
+    suspend fun getDeviceId() = dataStore.data.map { it[DEVICE_ID] }.first()
 
-    fun setDeviceId(deviceId: String) =
-        prefs.edit().putString(DEVICE_ID, deviceId).apply()
+    suspend fun setDeviceId(deviceId: String) {
+        dataStore.edit { it[DEVICE_ID] = deviceId }
+    }
 
-    fun setFirebaseToken(token: String) =
-        prefs.edit().putString(FIREBASE_TOKEN, token).apply()
+    suspend fun setFirebaseToken(token: String) {
+        dataStore.edit { it[FIREBASE_TOKEN] = token }
+    }
 
-    fun getFirebaseToken(): String? =
-        prefs.getString(FIREBASE_TOKEN, null)
+    suspend fun getFirebaseToken() = dataStore.data.map { it[FIREBASE_TOKEN] }.first()
 
-    fun getFirebaseTokenSent(): Boolean =
-        prefs.getBoolean(FIREBASE_TOKEN_SENT, false)
+    suspend fun getFirebaseTokenSent() =
+        dataStore.data.map { it[FIREBASE_TOKEN_SENT] }.first() ?: false
 
-    fun setFirebaseTokenSent() =
-        prefs.edit().putBoolean(FIREBASE_TOKEN_SENT, true).apply()
+    suspend fun setFirebaseTokenSent() {
+        dataStore.edit { it[FIREBASE_TOKEN_SENT] = true }
+    }
 
-    fun removeFirebaseTokenSent() =
-        prefs.edit().remove(FIREBASE_TOKEN_SENT).apply()
+    suspend fun removeFirebaseTokenSent() {
+        dataStore.edit { it.remove(FIREBASE_TOKEN_SENT) }
+    }
 
-    fun getUserRoles(): String? = prefs.getString(USER_ROLES, null)
+    suspend fun getUserRoles() = dataStore.data.map { it[USER_ROLES] }.first()
 
-    fun setUserRoles(roles: String) = prefs.edit().putString(USER_ROLES, roles).apply()
+    suspend fun setUserRoles(roles: String) {
+        dataStore.edit { it[USER_ROLES] = roles }
+    }
 
-    fun removeUserRoles() = prefs.edit().remove(USER_ROLES).apply()
+    suspend fun removeUserRoles() {
+        dataStore.edit { it.remove(USER_ROLES) }
+    }
 
 }
\ No newline at end of file
diff --git a/app/src/main/kotlin/com/whereismymotivation/data/remote/RequestHeaders.kt b/app/src/main/kotlin/com/whereismymotivation/data/remote/RequestHeaders.kt
index 09a6534..d00ba84 100644
--- a/app/src/main/kotlin/com/whereismymotivation/data/remote/RequestHeaders.kt
+++ b/app/src/main/kotlin/com/whereismymotivation/data/remote/RequestHeaders.kt
@@ -5,14 +5,14 @@ import com.whereismymotivation.di.qualifier.AccessTokenInfo
 import com.whereismymotivation.di.qualifier.ApiKeyInfo
 import com.whereismymotivation.di.qualifier.AppVersionCodeInfo
 import com.whereismymotivation.di.qualifier.DeviceIdInfo
-import com.whereismymotivation.utils.common.ResultFetcher
+import com.whereismymotivation.utils.common.ResultFetcherBlocking
 import javax.inject.Inject
 
 class RequestHeaders @Inject constructor(
     @ApiKeyInfo val apiKey: String,
-    @AccessTokenInfo val accessTokenFetcher: ResultFetcher<String>,
-    @DeviceIdInfo val deviceIdFetcher: ResultFetcher<String>,
-    @AppVersionCodeInfo val appVersionCodeFetcher: ResultFetcher<Long>,
+    @AccessTokenInfo val accessTokenFetcher: ResultFetcherBlocking<String>,
+    @DeviceIdInfo val deviceIdFetcher: ResultFetcherBlocking<String>,
+    @AppVersionCodeInfo val appVersionCodeFetcher: ResultFetcherBlocking<Long>,
 ) {
     object Key {
         const val API_AUTH_TYPE = "API_AUTH_TYPE"
diff --git a/app/src/main/kotlin/com/whereismymotivation/data/remote/interceptors/RefreshTokenInterceptor.kt b/app/src/main/kotlin/com/whereismymotivation/data/remote/interceptors/RefreshTokenInterceptor.kt
index 11bfc87..d81d987 100644
--- a/app/src/main/kotlin/com/whereismymotivation/data/remote/interceptors/RefreshTokenInterceptor.kt
+++ b/app/src/main/kotlin/com/whereismymotivation/data/remote/interceptors/RefreshTokenInterceptor.kt
@@ -6,8 +6,8 @@ import com.whereismymotivation.data.remote.apis.auth.request.RefreshTokenRequest
 import com.whereismymotivation.data.remote.utils.ForcedLogout
 import com.whereismymotivation.di.qualifier.AccessTokenInfo
 import com.whereismymotivation.di.qualifier.RefreshTokenInfo
-import com.whereismymotivation.utils.common.ResultCallback
-import com.whereismymotivation.utils.common.ResultFetcher
+import com.whereismymotivation.utils.common.ResultCallbackBlocking
+import com.whereismymotivation.utils.common.ResultFetcherBlocking
 import okhttp3.Interceptor
 import okhttp3.Response
 import java.io.IOException
@@ -17,10 +17,10 @@ import javax.inject.Singleton
 
 @Singleton
 class RefreshTokenInterceptor @Inject constructor(
-    @AccessTokenInfo private val accessTokenFetcher: ResultFetcher<String>,
-    @AccessTokenInfo private val accessTokenCallback: ResultCallback<String>,
-    @RefreshTokenInfo private val refreshTokenFetcher: ResultFetcher<String>,
-    @RefreshTokenInfo private val refreshTokenCallback: ResultCallback<String>,
+    @AccessTokenInfo private val accessTokenFetcher: ResultFetcherBlocking<String>,
+    @AccessTokenInfo private val accessTokenCallback: ResultCallbackBlocking<String>,
+    @RefreshTokenInfo private val refreshTokenFetcher: ResultFetcherBlocking<String>,
+    @RefreshTokenInfo private val refreshTokenCallback: ResultCallbackBlocking<String>,
     private val refreshTokenApi: RefreshTokenApi,
     private val forcedLogout: ForcedLogout,
 ) : Interceptor {
diff --git a/app/src/main/kotlin/com/whereismymotivation/data/repository/AppMetricRepository.kt b/app/src/main/kotlin/com/whereismymotivation/data/repository/AppMetricRepository.kt
index 3a6c723..5865022 100644
--- a/app/src/main/kotlin/com/whereismymotivation/data/repository/AppMetricRepository.kt
+++ b/app/src/main/kotlin/com/whereismymotivation/data/repository/AppMetricRepository.kt
@@ -9,7 +9,7 @@ class AppMetricRepository @Inject constructor(
     private val appMetricPreferences: AppMetricPreferences
 ) {
 
-    fun setCurrentAppVersion(appVersion: Long) {
+    suspend fun setCurrentAppVersion(appVersion: Long) {
         val lastAppVersion = getCurrentAppVersion()
         if (lastAppVersion != appVersion) {
             // app updated or first launch
@@ -17,13 +17,13 @@ class AppMetricRepository @Inject constructor(
         }
     }
 
-    fun getCurrentAppVersion(): Long =
+    private suspend fun getCurrentAppVersion(): Long =
         appMetricPreferences.getCurrentAppVersion()
 
-    fun setDailyMoodRecorderNotificationEnable(enable: Boolean) =
+    suspend fun setDailyMoodRecorderNotificationEnable(enable: Boolean) =
         appMetricPreferences.setDailyMoodRecorderNotificationEnable(enable)
 
-    fun isDailyMoodRecorderNotificationEnabled() =
+    suspend fun isDailyMoodRecorderNotificationEnabled() =
         appMetricPreferences.getDailyMoodRecorderNotificationEnable()
 
 }
diff --git a/app/src/main/kotlin/com/whereismymotivation/data/repository/ContentRepository.kt b/app/src/main/kotlin/com/whereismymotivation/data/repository/ContentRepository.kt
index 2f40099..f1c8b86 100644
--- a/app/src/main/kotlin/com/whereismymotivation/data/repository/ContentRepository.kt
+++ b/app/src/main/kotlin/com/whereismymotivation/data/repository/ContentRepository.kt
@@ -89,14 +89,14 @@ class ContentRepository @Inject constructor(
             emit(contentApi.unpublishGeneral(ContentSubmissionRequest(contentId)))
         }.map { it.message }
 
-    fun getFeedNextPageNumber(): Int = contentPreferences.getFeedNextPageNumber()
+    suspend fun getFeedNextPageNumber(): Int = contentPreferences.getFeedNextPageNumber()
 
-    fun setFeedNextPageNumber(pageNumber: Int) =
+    suspend fun setFeedNextPageNumber(pageNumber: Int) =
         contentPreferences.setFeedNextPageNumber(pageNumber)
 
-    fun getFeedLastSeen(): Long = contentPreferences.getFeedLastSeen()
+    suspend fun getFeedLastSeen(): Long = contentPreferences.getFeedLastSeen()
 
-    fun markFeedLastSeen() = contentPreferences.setFeedLastSeen(System.currentTimeMillis())
+    suspend fun markFeedLastSeen() = contentPreferences.setFeedLastSeen(System.currentTimeMillis())
 
     suspend fun getContentDetails(contentId: String): Flow<Content> =
         flow {
diff --git a/app/src/main/kotlin/com/whereismymotivation/data/repository/UserRepository.kt b/app/src/main/kotlin/com/whereismymotivation/data/repository/UserRepository.kt
index 69c239f..ce42aaf 100644
--- a/app/src/main/kotlin/com/whereismymotivation/data/repository/UserRepository.kt
+++ b/app/src/main/kotlin/com/whereismymotivation/data/repository/UserRepository.kt
@@ -22,9 +22,9 @@ class UserRepository @Inject constructor(
     private val userPreferences: UserPreferences
 ) {
 
-    fun userExists() = userPreferences.getUserId() != null
+    suspend fun userExists() = userPreferences.getUserId() != null
 
-    fun saveCurrentAuth(auth: Auth) {
+    suspend fun saveCurrentAuth(auth: Auth) {
         removeCurrentUser()
         val user = auth.user
         userPreferences.setUserId(user.id)
@@ -50,7 +50,7 @@ class UserRepository @Inject constructor(
         userPreferences.setUserProfileProfilePicUrl(user.profilePicUrl)
     }
 
-    fun removeCurrentUser() {
+    suspend fun removeCurrentUser() {
         userPreferences.removeUserId()
         userPreferences.removeUserName()
         userPreferences.removeUserEmail()
@@ -62,8 +62,9 @@ class UserRepository @Inject constructor(
         userPreferences.removeFirebaseTokenSent()
     }
 
-    fun getCurrentUser(): User? {
+    suspend fun mustGetCurrentUser() = getCurrentUser()!!
 
+    suspend fun getCurrentUser(): User? {
         val userId = userPreferences.getUserId()
         val userName = userPreferences.getUserName()
         val userEmail = userPreferences.getUserEmail()
@@ -91,16 +92,15 @@ class UserRepository @Inject constructor(
         return null
     }
 
-    fun markUserOnBoardingComplete() {
+    suspend fun markUserOnBoardingComplete() {
         userPreferences.setOnBoardingComplete(true)
     }
 
-    fun isOnBoardingComplete() = userPreferences.getOnBoardingComplete()
+    suspend fun isOnBoardingComplete() = userPreferences.getOnBoardingComplete()
 
-    fun saveDeviceId(deviceId: String) = userPreferences.setDeviceId(deviceId)
-
-    fun getDeviceId() = userPreferences.getDeviceId()
+    suspend fun saveDeviceId(deviceId: String) = userPreferences.setDeviceId(deviceId)
 
+    suspend fun getDeviceId() = userPreferences.getDeviceId()
 
     suspend fun sendFirebaseToken(token: String): Flow<String> =
         flow {
@@ -112,11 +112,11 @@ class UserRepository @Inject constructor(
             emit(userApi.message(MessageRequest("USER_ANDROID_FEEDBACK", message)))
         }.map { it.message }
 
-    fun getFirebaseToken(): String? = userPreferences.getFirebaseToken()
+    suspend fun getFirebaseToken(): String? = userPreferences.getFirebaseToken()
 
-    fun setFirebaseToken(token: String) = userPreferences.setFirebaseToken(token)
+    suspend fun setFirebaseToken(token: String) = userPreferences.setFirebaseToken(token)
 
-    fun getFirebaseTokenSent(): Boolean = userPreferences.getFirebaseTokenSent()
+    suspend fun getFirebaseTokenSent(): Boolean = userPreferences.getFirebaseTokenSent()
 
-    fun setFirebaseTokenSent() = userPreferences.setFirebaseTokenSent()
+    suspend fun setFirebaseTokenSent() = userPreferences.setFirebaseTokenSent()
 }
\ No newline at end of file
diff --git a/app/src/main/kotlin/com/whereismymotivation/di/module/ApplicationModule.kt b/app/src/main/kotlin/com/whereismymotivation/di/module/ApplicationModule.kt
index 0bb294c..bba92a3 100644
--- a/app/src/main/kotlin/com/whereismymotivation/di/module/ApplicationModule.kt
+++ b/app/src/main/kotlin/com/whereismymotivation/di/module/ApplicationModule.kt
@@ -14,7 +14,7 @@ import com.whereismymotivation.data.local.prefs.AppMetricPreferences
 import com.whereismymotivation.data.local.prefs.UserPreferences
 import com.whereismymotivation.di.qualifier.AppVersionCodeInfo
 import com.whereismymotivation.di.qualifier.DeviceIdInfo
-import com.whereismymotivation.utils.common.ResultFetcher
+import com.whereismymotivation.utils.common.ResultFetcherBlocking
 import com.whereismymotivation.utils.config.RemoteKey
 import com.whereismymotivation.utils.log.Logger
 import com.whereismymotivation.work.AppWorkManager
@@ -23,6 +23,7 @@ import dagger.Provides
 import dagger.hilt.InstallIn
 import dagger.hilt.android.qualifiers.ApplicationContext
 import dagger.hilt.components.SingletonComponent
+import kotlinx.coroutines.runBlocking
 import javax.inject.Singleton
 
 @Module
@@ -34,8 +35,8 @@ object ApplicationModule {
     @DeviceIdInfo
     fun provideDeviceId(
         userPreferences: UserPreferences
-    ): ResultFetcher<String> = object : ResultFetcher<String> {
-        override fun fetch(): String? = userPreferences.getDeviceId()
+    ): ResultFetcherBlocking<String> = object : ResultFetcherBlocking<String> {
+        override fun fetch(): String? = runBlocking { userPreferences.getDeviceId() }
     }
 
     @Provides
@@ -43,8 +44,8 @@ object ApplicationModule {
     @AppVersionCodeInfo
     fun provideAppVersionCode(
         appMetricPreferences: AppMetricPreferences
-    ): ResultFetcher<Long> = object : ResultFetcher<Long> {
-        override fun fetch(): Long = appMetricPreferences.getCurrentAppVersion()
+    ): ResultFetcherBlocking<Long> = object : ResultFetcherBlocking<Long> {
+        override fun fetch(): Long = runBlocking { appMetricPreferences.getCurrentAppVersion() }
     }
 
     @Provides
diff --git a/app/src/main/kotlin/com/whereismymotivation/di/module/LocalDataModule.kt b/app/src/main/kotlin/com/whereismymotivation/di/module/LocalDataModule.kt
index a9c83d9..7b49569 100644
--- a/app/src/main/kotlin/com/whereismymotivation/di/module/LocalDataModule.kt
+++ b/app/src/main/kotlin/com/whereismymotivation/di/module/LocalDataModule.kt
@@ -1,11 +1,12 @@
 package com.whereismymotivation.di.module
 
 import android.content.Context
-import android.content.SharedPreferences
+import androidx.datastore.core.DataStore
+import androidx.datastore.preferences.core.Preferences
+import androidx.datastore.preferences.preferencesDataStore
 import androidx.room.Room
 import com.whereismymotivation.data.local.db.DatabaseService
 import com.whereismymotivation.di.qualifier.DatabaseInfo
-import com.whereismymotivation.di.qualifier.PrefsInfo
 import dagger.Module
 import dagger.Provides
 import dagger.hilt.InstallIn
@@ -13,6 +14,8 @@ import dagger.hilt.android.qualifiers.ApplicationContext
 import dagger.hilt.components.SingletonComponent
 import javax.inject.Singleton
 
+val Context.dataStore: DataStore<Preferences> by preferencesDataStore(name = "wimm-prefs")
+
 @Module
 @InstallIn(SingletonComponent::class)
 object LocalDataModule {
@@ -24,15 +27,9 @@ object LocalDataModule {
 
     @Provides
     @Singleton
-    @PrefsInfo
-    fun providePreferenceName(): String = "wimm-prefs"
-
-    @Provides
-    @Singleton
-    fun provideSharedPreferences(
+    fun provideDataStorePreferences(
         @ApplicationContext context: Context,
-        @PrefsInfo prefName: String
-    ): SharedPreferences = context.getSharedPreferences(prefName, Context.MODE_PRIVATE)
+    ): DataStore<Preferences> = context.dataStore
 
     @Provides
     @Singleton
diff --git a/app/src/main/kotlin/com/whereismymotivation/di/module/NetworkModule.kt b/app/src/main/kotlin/com/whereismymotivation/di/module/NetworkModule.kt
index 6e38159..7896f78 100644
--- a/app/src/main/kotlin/com/whereismymotivation/di/module/NetworkModule.kt
+++ b/app/src/main/kotlin/com/whereismymotivation/di/module/NetworkModule.kt
@@ -21,13 +21,14 @@ import com.whereismymotivation.di.qualifier.AccessTokenInfo
 import com.whereismymotivation.di.qualifier.ApiKeyInfo
 import com.whereismymotivation.di.qualifier.BaseUrl
 import com.whereismymotivation.di.qualifier.RefreshTokenInfo
-import com.whereismymotivation.utils.common.ResultCallback
-import com.whereismymotivation.utils.common.ResultFetcher
+import com.whereismymotivation.utils.common.ResultCallbackBlocking
+import com.whereismymotivation.utils.common.ResultFetcherBlocking
 import dagger.Module
 import dagger.Provides
 import dagger.hilt.InstallIn
 import dagger.hilt.android.qualifiers.ApplicationContext
 import dagger.hilt.components.SingletonComponent
+import kotlinx.coroutines.runBlocking
 import okhttp3.OkHttpClient
 import javax.inject.Singleton
 
@@ -163,8 +164,8 @@ object NetworkModule {
     @AccessTokenInfo
     fun provideAccessToken(
         userPreferences: UserPreferences
-    ): ResultFetcher<String> = object : ResultFetcher<String> {
-        override fun fetch(): String? = userPreferences.getAccessToken()
+    ): ResultFetcherBlocking<String> = object : ResultFetcherBlocking<String> {
+        override fun fetch(): String? = runBlocking { userPreferences.getAccessToken() }
     }
 
     @Provides
@@ -172,8 +173,8 @@ object NetworkModule {
     @RefreshTokenInfo
     fun provideRefreshToken(
         userPreferences: UserPreferences
-    ): ResultFetcher<String> = object : ResultFetcher<String> {
-        override fun fetch(): String? = userPreferences.getRefreshToken()
+    ): ResultFetcherBlocking<String> = object : ResultFetcherBlocking<String> {
+        override fun fetch(): String? = runBlocking { userPreferences.getRefreshToken() }
     }
 
     @Provides
@@ -181,8 +182,9 @@ object NetworkModule {
     @AccessTokenInfo
     fun provideAccessTokenSaveLambda(
         userPreferences: UserPreferences
-    ): ResultCallback<String> = object : ResultCallback<String> {
-        override fun onResult(result: String) = userPreferences.setAccessToken(result)
+    ): ResultCallbackBlocking<String> = object : ResultCallbackBlocking<String> {
+        override fun onResult(result: String) =
+            runBlocking { userPreferences.setAccessToken(result) }
     }
 
     @Provides
@@ -190,7 +192,8 @@ object NetworkModule {
     @RefreshTokenInfo
     fun provideRefreshTokenSaveLambda(
         userPreferences: UserPreferences
-    ): ResultCallback<String> = object : ResultCallback<String> {
-        override fun onResult(result: String) = userPreferences.setRefreshToken(result)
+    ): ResultCallbackBlocking<String> = object : ResultCallbackBlocking<String> {
+        override fun onResult(result: String) =
+            runBlocking { userPreferences.setRefreshToken(result) }
     }
 }
\ No newline at end of file
diff --git a/app/src/main/kotlin/com/whereismymotivation/di/qualifier/PrefsInfo.kt b/app/src/main/kotlin/com/whereismymotivation/di/qualifier/PrefsInfo.kt
deleted file mode 100644
index c750a9c..0000000
--- a/app/src/main/kotlin/com/whereismymotivation/di/qualifier/PrefsInfo.kt
+++ /dev/null
@@ -1,7 +0,0 @@
-package com.whereismymotivation.di.qualifier
-
-import javax.inject.Qualifier
-
-@Qualifier
-@Retention(AnnotationRetention.RUNTIME)
-annotation class PrefsInfo
\ No newline at end of file
diff --git a/app/src/main/kotlin/com/whereismymotivation/init/CoilInit.kt b/app/src/main/kotlin/com/whereismymotivation/init/CoilInit.kt
index 0b0d88e..9abcf8b 100644
--- a/app/src/main/kotlin/com/whereismymotivation/init/CoilInit.kt
+++ b/app/src/main/kotlin/com/whereismymotivation/init/CoilInit.kt
@@ -8,8 +8,8 @@ import javax.inject.Singleton
 @Singleton
 class CoilInit @Inject constructor(
     private val imageLoader: ImageLoader
-): Initializer {
-    override fun init() {
+) : Initializer {
+    override suspend fun init() {
         Coil.setImageLoader(imageLoader)
     }
 }
\ No newline at end of file
diff --git a/app/src/main/kotlin/com/whereismymotivation/init/FirebaseInit.kt b/app/src/main/kotlin/com/whereismymotivation/init/FirebaseInit.kt
index f0c2e8c..caafa46 100644
--- a/app/src/main/kotlin/com/whereismymotivation/init/FirebaseInit.kt
+++ b/app/src/main/kotlin/com/whereismymotivation/init/FirebaseInit.kt
@@ -27,13 +27,13 @@ class FirebaseInit @Inject constructor(
     @ApplicationContext private val context: Context,
     private val userRepository: UserRepository,
 ) : Initializer {
-    override fun init() {
+    override suspend fun init() {
         recordUser()
         syncFcmToken()
         createDefaultNotificationChannel()
     }
 
-    private fun recordUser() {
+    private suspend fun recordUser() {
         userRepository.getCurrentUser()?.run {
             Firebase.crashlytics.setUserId(id)
             Firebase.analytics.setUserId(id)
@@ -43,7 +43,7 @@ class FirebaseInit @Inject constructor(
     }
 
     @OptIn(DelicateCoroutinesApi::class)
-    private fun syncFcmToken() {
+    private suspend fun syncFcmToken() {
         if (!userRepository.getFirebaseTokenSent() && userRepository.userExists()) {
             FirebaseMessaging.getInstance().token.addOnCompleteListener { task ->
                 if (!task.isSuccessful) {
@@ -54,19 +54,18 @@ class FirebaseInit @Inject constructor(
                     )
                     return@addOnCompleteListener
                 }
-                val token = task.result
-
-                userRepository.setFirebaseToken(token)
-
-                GlobalScope.launch {
-                    userRepository.sendFirebaseToken(token)
-                        .catch { }
-                        .collect {
-                            userRepository.setFirebaseTokenSent()
-                        }
+                task.result?.let {
+                    GlobalScope.launch {
+                        userRepository.setFirebaseToken(it)
+                        userRepository.sendFirebaseToken(it)
+                            .catch { e ->
+                                Logger.record(e)
+                            }.collect {
+                                userRepository.setFirebaseTokenSent()
+                            }
+                    }
+                    if (BuildConfig.DEBUG) Logger.d(WimmApplication.TAG, it)
                 }
-
-                if (BuildConfig.DEBUG) Logger.d(WimmApplication.TAG, token)
             }
         }
     }
@@ -78,25 +77,23 @@ class FirebaseInit @Inject constructor(
                 // or other notification behaviors after this
                 val notificationManager =
                     context.getSystemService(NOTIFICATION_SERVICE) as NotificationManager
-                notificationManager.createNotificationChannel(
-                    NotificationChannel(
-                        context.getString(R.string.default_notification_channel_id),
-                        context.getString(R.string.notification_default_channel_name),
-                        NotificationManager.IMPORTANCE_DEFAULT
-                    ).apply {
-                        description =
-                            context.getString(R.string.notification_default_channel_description)
-                    })
+                notificationManager.createNotificationChannel(NotificationChannel(
+                    context.getString(R.string.default_notification_channel_id),
+                    context.getString(R.string.notification_default_channel_name),
+                    NotificationManager.IMPORTANCE_DEFAULT
+                ).apply {
+                    description =
+                        context.getString(R.string.notification_default_channel_description)
+                })
 
-                notificationManager.createNotificationChannel(
-                    NotificationChannel(
-                        context.getString(R.string.happiness_notification_channel_id),
-                        context.getString(R.string.notification_happiness_channel_name),
-                        NotificationManager.IMPORTANCE_DEFAULT
-                    ).apply {
-                        description =
-                            context.getString(R.string.notification_happiness_channel_description)
-                    })
+                notificationManager.createNotificationChannel(NotificationChannel(
+                    context.getString(R.string.happiness_notification_channel_id),
+                    context.getString(R.string.notification_happiness_channel_name),
+                    NotificationManager.IMPORTANCE_DEFAULT
+                ).apply {
+                    description =
+                        context.getString(R.string.notification_happiness_channel_description)
+                })
             }
         } catch (e: Exception) {
             Logger.record(e)
diff --git a/app/src/main/kotlin/com/whereismymotivation/init/Initializer.kt b/app/src/main/kotlin/com/whereismymotivation/init/Initializer.kt
index 131b8ed..b6e2ccb 100644
--- a/app/src/main/kotlin/com/whereismymotivation/init/Initializer.kt
+++ b/app/src/main/kotlin/com/whereismymotivation/init/Initializer.kt
@@ -1,5 +1,5 @@
 package com.whereismymotivation.init
 
 interface Initializer {
-    fun init()
+    suspend fun init()
 }
\ No newline at end of file
diff --git a/app/src/main/kotlin/com/whereismymotivation/init/MetricInit.kt b/app/src/main/kotlin/com/whereismymotivation/init/MetricInit.kt
index 8f86c8a..33d3bc7 100644
--- a/app/src/main/kotlin/com/whereismymotivation/init/MetricInit.kt
+++ b/app/src/main/kotlin/com/whereismymotivation/init/MetricInit.kt
@@ -12,7 +12,7 @@ class MetricInit @Inject constructor(
     @ApplicationContext private val context: Context,
     private var appMetricRepository: AppMetricRepository
 ) : Initializer {
-    override fun init() {
+    override suspend fun init() {
         appMetricRepository.setCurrentAppVersion(SystemUtils.getAppVersionCode(context))
     }
 }
\ No newline at end of file
diff --git a/app/src/main/kotlin/com/whereismymotivation/init/WorkInit.kt b/app/src/main/kotlin/com/whereismymotivation/init/WorkInit.kt
index 6506821..b80eeaf 100644
--- a/app/src/main/kotlin/com/whereismymotivation/init/WorkInit.kt
+++ b/app/src/main/kotlin/com/whereismymotivation/init/WorkInit.kt
@@ -12,11 +12,11 @@ class WorkInit @Inject constructor(
     private val alarmManager: AppAlarmManager,
     private val appMetricPreferences: AppMetricPreferences
 ) : Initializer {
-    override fun init() {
+    override suspend fun init() {
         scheduleWorks()
     }
 
-    private fun scheduleWorks() {
+    private suspend fun scheduleWorks() {
         val time = appMetricPreferences.getDailyRecordAlarmTime()
         alarmManager.setDailyMoodAlarm(time.first, time.second, time.third)
 
diff --git a/app/src/main/kotlin/com/whereismymotivation/ui/feed/FeedViewModel.kt b/app/src/main/kotlin/com/whereismymotivation/ui/feed/FeedViewModel.kt
index 3beb4e0..5bdc3d6 100644
--- a/app/src/main/kotlin/com/whereismymotivation/ui/feed/FeedViewModel.kt
+++ b/app/src/main/kotlin/com/whereismymotivation/ui/feed/FeedViewModel.kt
@@ -15,6 +15,7 @@ import com.whereismymotivation.ui.navigation.Navigator
 import dagger.hilt.android.lifecycle.HiltViewModel
 import kotlinx.coroutines.delay
 import kotlinx.coroutines.launch
+import kotlinx.coroutines.runBlocking
 import javax.inject.Inject
 
 @HiltViewModel
@@ -38,11 +39,12 @@ class FeedViewModel @Inject constructor(
 
     private var loading = false
     private var pageItemCount = remoteConfigRepository.getHomePageContentCount()
-    private var startPageNumber = contentRepository.getFeedNextPageNumber()
+    private var startPageNumber = runBlocking { contentRepository.getFeedNextPageNumber() }
     private var currentPageNumber = startPageNumber
 
     init {
-        if ((System.currentTimeMillis() - contentRepository.getFeedLastSeen()) / 1000 / 60 / 60 > 3) {
+        val lastSeenTime = runBlocking { contentRepository.getFeedLastSeen() }
+        if ((System.currentTimeMillis() - lastSeenTime) / 1000 / 60 / 60 > 3) {
             rotateFeedList()
         }
 
@@ -53,7 +55,7 @@ class FeedViewModel @Inject constructor(
     }
 
     private fun rotateFeedList(reload: Boolean = false) {
-        contentRepository.setFeedNextPageNumber(1)
+        viewModelScope.launch { contentRepository.setFeedNextPageNumber(1) }
         startPageNumber = 1
         currentPageNumber = startPageNumber
         if (reload) loadMoreContents()
@@ -114,7 +116,7 @@ class FeedViewModel @Inject constructor(
     }
 
     override fun onCleared() {
-        contentRepository.markFeedLastSeen()
+        viewModelScope.launch { contentRepository.markFeedLastSeen() }
         super.onCleared()
     }
 }
\ No newline at end of file
diff --git a/app/src/main/kotlin/com/whereismymotivation/ui/journal/JournalsViewModel.kt b/app/src/main/kotlin/com/whereismymotivation/ui/journal/JournalsViewModel.kt
index e17d273..da6efcf 100644
--- a/app/src/main/kotlin/com/whereismymotivation/ui/journal/JournalsViewModel.kt
+++ b/app/src/main/kotlin/com/whereismymotivation/ui/journal/JournalsViewModel.kt
@@ -24,7 +24,7 @@ import javax.inject.Inject
 class JournalsViewModel @Inject constructor(
     loader: Loader,
     navigator: Navigator,
-    userRepository: UserRepository,
+    val userRepository: UserRepository,
     val messenger: Messenger,
     private val journalRepository: JournalRepository
 ) : BaseViewModel(loader, messenger, navigator) {
@@ -33,8 +33,6 @@ class JournalsViewModel @Inject constructor(
         const val TAG = "JournalsViewModel"
     }
 
-    private val user = userRepository.getCurrentUser()!!
-
     private val pageItemCount = 10
     private var loading = false
     private var currentPageNumber = 1
@@ -49,6 +47,7 @@ class JournalsViewModel @Inject constructor(
         if (loading) return
         loading = true
         viewModelScope.launch {
+            val user = userRepository.mustGetCurrentUser()
             journalRepository
                 .fetchJournals(user.id, pageNumber, pageItemCount)
                 .catch {
@@ -93,6 +92,7 @@ class JournalsViewModel @Inject constructor(
             return messenger.deliverRes(Message.error(R.string.record_can_not_empty))
 
         viewModelScope.launch {
+            val user = userRepository.mustGetCurrentUser()
             val now = CalendarUtils.now()
             val journal = Journal(0, String.Null(), text, user.id, now, now)
             journalRepository
diff --git a/app/src/main/kotlin/com/whereismymotivation/ui/moods/MoodsViewModel.kt b/app/src/main/kotlin/com/whereismymotivation/ui/moods/MoodsViewModel.kt
index 67bf42d..b9329da 100644
--- a/app/src/main/kotlin/com/whereismymotivation/ui/moods/MoodsViewModel.kt
+++ b/app/src/main/kotlin/com/whereismymotivation/ui/moods/MoodsViewModel.kt
@@ -22,7 +22,7 @@ import javax.inject.Inject
 class MoodsViewModel @Inject constructor(
     loader: Loader,
     navigator: Navigator,
-    userRepository: UserRepository,
+    val userRepository: UserRepository,
     val messenger: Messenger,
     private val moodRepository: MoodRepository
 ) : BaseViewModel(loader, messenger, navigator) {
@@ -31,7 +31,6 @@ class MoodsViewModel @Inject constructor(
         const val TAG = "MoodsViewModel"
     }
 
-    private val user = userRepository.getCurrentUser()!!
     private val moods = mutableStateListOf<Mood>()
 
     private val _moodGraph = mutableStateListOf<MoodGraphData>()
@@ -44,6 +43,7 @@ class MoodsViewModel @Inject constructor(
 
     private fun loadMoods() {
         viewModelScope.launch {
+            val user = userRepository.mustGetCurrentUser()
             moodRepository.fetchMoods(user.id)
                 .catch {
                     messenger.deliverRes(Message.error(R.string.something_went_wrong))
@@ -76,6 +76,7 @@ class MoodsViewModel @Inject constructor(
 
     fun selectMood(code: Mood.Code) {
         viewModelScope.launch {
+            val user = userRepository.mustGetCurrentUser()
             val now = CalendarUtils.now()
             val mood = Mood(0, String.Null(), code, user.id, now, now)
             val dateStr = CalendarUtils.getFormattedDate(now) ?: "Unknown"
diff --git a/app/src/main/kotlin/com/whereismymotivation/ui/mybox/MyBoxViewModel.kt b/app/src/main/kotlin/com/whereismymotivation/ui/mybox/MyBoxViewModel.kt
index 5024e28..4d3df6d 100644
--- a/app/src/main/kotlin/com/whereismymotivation/ui/mybox/MyBoxViewModel.kt
+++ b/app/src/main/kotlin/com/whereismymotivation/ui/mybox/MyBoxViewModel.kt
@@ -13,6 +13,7 @@ import com.whereismymotivation.ui.navigation.Navigator
 import dagger.hilt.android.lifecycle.HiltViewModel
 import kotlinx.coroutines.flow.MutableStateFlow
 import kotlinx.coroutines.flow.asStateFlow
+import kotlinx.coroutines.runBlocking
 import javax.inject.Inject
 
 @HiltViewModel
@@ -29,7 +30,7 @@ class MyBoxViewModel @Inject constructor(
         const val TAG = "MyBoxViewModel"
     }
 
-    private val _user = MutableStateFlow(userRepository.getCurrentUser()!!)
+    private val _user = MutableStateFlow(runBlocking { userRepository.mustGetCurrentUser() })
     private val _contents = mutableStateListOf<Content>()
 
     val user = _user.asStateFlow()
diff --git a/app/src/main/kotlin/com/whereismymotivation/ui/profile/ProfileViewModel.kt b/app/src/main/kotlin/com/whereismymotivation/ui/profile/ProfileViewModel.kt
index 59a92ac..5d8c749 100644
--- a/app/src/main/kotlin/com/whereismymotivation/ui/profile/ProfileViewModel.kt
+++ b/app/src/main/kotlin/com/whereismymotivation/ui/profile/ProfileViewModel.kt
@@ -1,7 +1,6 @@
 package com.whereismymotivation.ui.profile
 
 import androidx.lifecycle.SavedStateHandle
-import com.whereismymotivation.R
 import com.whereismymotivation.data.repository.AuthRepository
 import com.whereismymotivation.data.repository.UserRepository
 import com.whereismymotivation.ui.base.BaseViewModel
@@ -13,6 +12,7 @@ import com.whereismymotivation.ui.navigation.Navigator
 import dagger.hilt.android.lifecycle.HiltViewModel
 import kotlinx.coroutines.flow.MutableStateFlow
 import kotlinx.coroutines.flow.asStateFlow
+import kotlinx.coroutines.runBlocking
 import javax.inject.Inject
 
 @HiltViewModel
@@ -31,11 +31,12 @@ class ProfileViewModel @Inject constructor(
 
     private var _selectedTab = MutableStateFlow(
         ProfileTab.fromName(
-            savedStateHandle.get<String>(Destination.Home.Profile.routeArgName) ?: ProfileTab.MOOD.name
+            savedStateHandle.get<String>(Destination.Home.Profile.routeArgName)
+                ?: ProfileTab.MOOD.name
         )
     )
 
-    private val _user = MutableStateFlow(userRepository.getCurrentUser()!!)
+    private val _user = MutableStateFlow(runBlocking { userRepository.mustGetCurrentUser() })
 
     val user = _user.asStateFlow()
     val selectedTab = _selectedTab.asStateFlow()
@@ -45,18 +46,13 @@ class ProfileViewModel @Inject constructor(
     }
 
     fun logout() {
-        val exists = userRepository.userExists()
-        if (exists) {
-            launchNetwork {
-                authRepository.logout()
-                    .collect {
-                        userRepository.removeCurrentUser()
-                        navigator.navigateTo(Destination.Login.route, true)
-                        messenger.deliver(Message.success("Logout Success"))
-                    }
-            }
-        } else {
-            messenger.deliverRes(Message.error(R.string.something_went_wrong))
+        launchNetwork {
+            authRepository.logout()
+                .collect {
+                    userRepository.removeCurrentUser()
+                    navigator.navigateTo(Destination.Login.route, true)
+                    messenger.deliver(Message.success("Logout Success"))
+                }
         }
     }
 }
\ No newline at end of file
diff --git a/app/src/main/kotlin/com/whereismymotivation/ui/splash/SplashViewModel.kt b/app/src/main/kotlin/com/whereismymotivation/ui/splash/SplashViewModel.kt
index 5fed185..641b670 100644
--- a/app/src/main/kotlin/com/whereismymotivation/ui/splash/SplashViewModel.kt
+++ b/app/src/main/kotlin/com/whereismymotivation/ui/splash/SplashViewModel.kt
@@ -1,5 +1,6 @@
 package com.whereismymotivation.ui.splash
 
+import androidx.lifecycle.viewModelScope
 import com.google.firebase.remoteconfig.FirebaseRemoteConfig
 import com.whereismymotivation.data.repository.UserRepository
 import com.whereismymotivation.ui.base.BaseViewModel
@@ -8,6 +9,7 @@ import com.whereismymotivation.ui.common.snackbar.Messenger
 import com.whereismymotivation.ui.navigation.Destination
 import com.whereismymotivation.ui.navigation.Navigator
 import dagger.hilt.android.lifecycle.HiltViewModel
+import kotlinx.coroutines.launch
 import javax.inject.Inject
 
 @HiltViewModel
@@ -26,15 +28,17 @@ class SplashViewModel @Inject constructor(
     init {
         // TODO: think of this for open source use case
         firebaseRemote.ensureInitialized().addOnCompleteListener {
-            val exists = userRepository.userExists()
-            if (exists) {
-                if (userRepository.isOnBoardingComplete()) {
-                    navigator.navigateTo(Destination.Home.route, true)
+            viewModelScope.launch {
+                val exists = userRepository.userExists()
+                if (exists) {
+                    if (userRepository.isOnBoardingComplete()) {
+                        navigator.navigateTo(Destination.Home.route, true)
+                    } else {
+                        navigator.navigateTo(Destination.Onboarding.route, true)
+                    }
                 } else {
-                    navigator.navigateTo(Destination.Onboarding.route, true)
+                    navigator.navigateTo(Destination.Login.route, true)
                 }
-            } else {
-                navigator.navigateTo(Destination.Login.route, true)
             }
         }
     }
diff --git a/app/src/main/kotlin/com/whereismymotivation/utils/common/ResultCallback.kt b/app/src/main/kotlin/com/whereismymotivation/utils/common/ResultCallback.kt
index 5365468..4383ce9 100644
--- a/app/src/main/kotlin/com/whereismymotivation/utils/common/ResultCallback.kt
+++ b/app/src/main/kotlin/com/whereismymotivation/utils/common/ResultCallback.kt
@@ -1,5 +1,9 @@
 package com.whereismymotivation.utils.common
 
 interface ResultCallback<T : Any> {
+    suspend fun onResult(result: T)
+}
+
+interface ResultCallbackBlocking<T : Any> {
     fun onResult(result: T)
 }
\ No newline at end of file
diff --git a/app/src/main/kotlin/com/whereismymotivation/utils/common/ResultFetcher.kt b/app/src/main/kotlin/com/whereismymotivation/utils/common/ResultFetcher.kt
index ef4e76e..96b519b 100644
--- a/app/src/main/kotlin/com/whereismymotivation/utils/common/ResultFetcher.kt
+++ b/app/src/main/kotlin/com/whereismymotivation/utils/common/ResultFetcher.kt
@@ -1,5 +1,9 @@
 package com.whereismymotivation.utils.common
 
 interface ResultFetcher<T : Any> {
+    suspend fun fetch(): T?
+}
+
+interface ResultFetcherBlocking<T : Any> {
     fun fetch(): T?
 }
\ No newline at end of file
diff --git a/app/src/main/kotlin/com/whereismymotivation/work/AppAlarmManager.kt b/app/src/main/kotlin/com/whereismymotivation/work/AppAlarmManager.kt
index 7f97404..ef50f41 100644
--- a/app/src/main/kotlin/com/whereismymotivation/work/AppAlarmManager.kt
+++ b/app/src/main/kotlin/com/whereismymotivation/work/AppAlarmManager.kt
@@ -23,7 +23,7 @@ class AppAlarmManager @Inject constructor(
         const val ACTION_DAILY_MOOD_RECORD = "ACTION_DAILY_MOOD_RECORD"
     }
 
-    fun setDailyMoodAlarm(hour: Int, min: Int, sec: Int) {
+    suspend fun setDailyMoodAlarm(hour: Int, min: Int, sec: Int) {
         if (!appMetricRepository.isDailyMoodRecorderNotificationEnabled()) return
 
         try {
diff --git a/app/src/test/java/com/whereismymotivation/ui/login/LoginViewModelTest.kt b/app/src/test/java/com/whereismymotivation/ui/login/LoginViewModelTest.kt
index 01f19bf..18316da 100644
--- a/app/src/test/java/com/whereismymotivation/ui/login/LoginViewModelTest.kt
+++ b/app/src/test/java/com/whereismymotivation/ui/login/LoginViewModelTest.kt
@@ -10,7 +10,6 @@ import com.whereismymotivation.ui.navigation.Destination
 import com.whereismymotivation.ui.navigation.Navigator
 import io.mockk.coEvery
 import io.mockk.coVerify
-import io.mockk.every
 import io.mockk.just
 import io.mockk.mockk
 import io.mockk.runs
@@ -63,7 +62,7 @@ class LoginViewModelTest {
     }
 
     @Test
-    fun `should fail if email is invalid`() = runTest {
+    fun `should fail if email is invalid`(): Unit = runTest {
         // Data
         val email = "email"
         val password = "password"
@@ -80,7 +79,7 @@ class LoginViewModelTest {
     }
 
     @Test
-    fun `should fail if password is less that 6 characters`() = runTest {
+    fun `should fail if password is less that 6 characters`(): Unit = runTest {
         // Data
         val email = "a@b.com"
         val password = "pass"
@@ -97,7 +96,7 @@ class LoginViewModelTest {
     }
 
     @Test
-    fun `should succeed login with credentials`() = runTest {
+    fun `should succeed login with credentials`(): Unit = runTest {
         // Data
         val auth: Auth = mockk()
 
@@ -110,17 +109,17 @@ class LoginViewModelTest {
         // Arrange
         coEvery { authRepository.basicLogin(any(), any()) } returns flow { emit(auth) }
 
-        every { userRepository.saveCurrentAuth(any()) } just runs
+        coEvery { userRepository.saveCurrentAuth(any()) } just runs
 
-        every { userRepository.getFirebaseToken() } returns "token"
+        coEvery { userRepository.getFirebaseToken() } returns "token"
 
-        every { userRepository.userExists() } returns true
+        coEvery { userRepository.userExists() } returns true
 
         coEvery { userRepository.sendFirebaseToken(any()) } returns flow { emit("") }
 
-        every { userRepository.setFirebaseTokenSent() } just runs
+        coEvery { userRepository.setFirebaseTokenSent() } just runs
 
-        every { userRepository.isOnBoardingComplete() } returns true
+        coEvery { userRepository.isOnBoardingComplete() } returns true
 
         // Act
         viewModel.basicLogin()
diff --git a/gradle/libs.versions.toml b/gradle/libs.versions.toml
index 164c529..9ae4c45 100644
--- a/gradle/libs.versions.toml
+++ b/gradle/libs.versions.toml
@@ -24,6 +24,7 @@ room = "2.6.1"
 hiltKtx = "1.2.0"
 coil = "2.5.0"
 lottie = "6.3.0"
+datastore = "1.1.1"
 junit = "4.13.2"
 mockk = "1.13.9"
 coroutines-test = "1.7.3"
@@ -108,6 +109,9 @@ coil = { module = "io.coil-kt:coil", version.ref = "coil"}
 coil-compose = { module = "io.coil-kt:coil-compose", version.ref = "coil"}
 lottie-compose = { module = "com.airbnb.android:lottie-compose", version.ref = "lottie"}
 
+# Data Store
+datastore-preferences = { module = "androidx.datastore:datastore-preferences", version.ref = "datastore"}
+
 # Unit Test
 junit = { module = "junit:junit", version.ref = "junit"}
 mockk = { module = "io.mockk:mockk", version.ref = "mockk"}