diff --git a/feature/settings/src/main/kotlin/com/google/samples/apps/nowinandroid/feature/settings/SettingsViewModel.kt b/feature/settings/src/main/kotlin/com/google/samples/apps/nowinandroid/feature/settings/SettingsViewModel.kt
index 123c84d1c..526a2a1cd 100644
--- a/feature/settings/src/main/kotlin/com/google/samples/apps/nowinandroid/feature/settings/SettingsViewModel.kt
+++ b/feature/settings/src/main/kotlin/com/google/samples/apps/nowinandroid/feature/settings/SettingsViewModel.kt
@@ -16,14 +16,23 @@
 
 package com.google.samples.apps.nowinandroid.feature.settings
 
+import android.app.UiModeManager
+import android.content.Context
+import android.os.Build
+import android.os.Build.VERSION_CODES
+import androidx.appcompat.app.AppCompatDelegate
 import androidx.lifecycle.ViewModel
 import androidx.lifecycle.viewModelScope
 import com.google.samples.apps.nowinandroid.core.data.repository.UserDataRepository
 import com.google.samples.apps.nowinandroid.core.model.data.DarkThemeConfig
+import com.google.samples.apps.nowinandroid.core.model.data.DarkThemeConfig.DARK
+import com.google.samples.apps.nowinandroid.core.model.data.DarkThemeConfig.FOLLOW_SYSTEM
+import com.google.samples.apps.nowinandroid.core.model.data.DarkThemeConfig.LIGHT
 import com.google.samples.apps.nowinandroid.core.model.data.ThemeBrand
 import com.google.samples.apps.nowinandroid.feature.settings.SettingsUiState.Loading
 import com.google.samples.apps.nowinandroid.feature.settings.SettingsUiState.Success
 import dagger.hilt.android.lifecycle.HiltViewModel
+import dagger.hilt.android.qualifiers.ApplicationContext
 import kotlinx.coroutines.flow.SharingStarted.Companion.WhileSubscribed
 import kotlinx.coroutines.flow.StateFlow
 import kotlinx.coroutines.flow.map
@@ -35,6 +44,7 @@ import kotlin.time.Duration.Companion.seconds
 @HiltViewModel
 class SettingsViewModel @Inject constructor(
     private val userDataRepository: UserDataRepository,
+    @ApplicationContext private val context: Context,
 ) : ViewModel() {
     val settingsUiState: StateFlow<SettingsUiState> =
         userDataRepository.userData
@@ -62,6 +72,21 @@ class SettingsViewModel @Inject constructor(
     fun updateDarkThemeConfig(darkThemeConfig: DarkThemeConfig) {
         viewModelScope.launch {
             userDataRepository.setDarkThemeConfig(darkThemeConfig)
+            val splashMode = when (darkThemeConfig) {
+                FOLLOW_SYSTEM -> AppCompatDelegate.MODE_NIGHT_FOLLOW_SYSTEM
+                LIGHT -> AppCompatDelegate.MODE_NIGHT_NO
+                DARK -> AppCompatDelegate.MODE_NIGHT_YES
+            }
+            AppCompatDelegate.setDefaultNightMode(splashMode)
+            if (Build.VERSION.SDK_INT >= VERSION_CODES.S) {
+                val uiModeMode = when (darkThemeConfig) {
+                    FOLLOW_SYSTEM -> UiModeManager.MODE_NIGHT_AUTO
+                    LIGHT -> UiModeManager.MODE_NIGHT_NO
+                    DARK -> UiModeManager.MODE_NIGHT_YES
+                }
+                (context.getSystemService(Context.UI_MODE_SERVICE) as? UiModeManager)
+                    ?.setApplicationNightMode(uiModeMode)
+            }
         }
     }