diff --git a/app/build.gradle b/app/build.gradle
index ecf9159d..ed17da34 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -41,6 +41,7 @@ android {
 
     buildTypes {
         debug {
+            getIsDefault().set(true)
             minifyEnabled = false
             manifestPlaceholders = [
                     buildTimestamp: 0
@@ -55,7 +56,8 @@ android {
     }
     flavorDimensions "platform"
     productFlavors {
-        main {
+        unofficial {
+            getIsDefault().set(true)
             versionName "${release.versionName}-${gitInfo.versionSuffix}"
         }
         official {}
@@ -63,7 +65,18 @@ android {
     }
     variantFilter { variant ->
         def flavors = variant.flavors*.name
-        setIgnore(variant.buildType.name == "debug" && !flavors.contains("main"))
+        setIgnore(variant.buildType.name == "debug" && !flavors.contains("unofficial") || flavors.contains("main"))
+    }
+    sourceSets {
+        unofficial {
+            java.srcDirs = ["src/main/java", "src/play-not/java"]
+        }
+        official {
+            java.srcDirs = ["src/main/java", "src/play-not/java"]
+        }
+        play {
+            java.srcDirs = ["src/main/java", "src/play/java"]
+        }
     }
 
     defaultConfig {
diff --git a/app/src/main/java/pl/szczodrzynski/edziennik/sync/UpdateDownloaderService.kt b/app/src/play-not/java/pl/szczodrzynski/edziennik/sync/UpdateDownloaderService.kt
similarity index 100%
rename from app/src/main/java/pl/szczodrzynski/edziennik/sync/UpdateDownloaderService.kt
rename to app/src/play-not/java/pl/szczodrzynski/edziennik/sync/UpdateDownloaderService.kt
diff --git a/app/src/play/java/pl/szczodrzynski/edziennik/sync/UpdateDownloaderService.kt b/app/src/play/java/pl/szczodrzynski/edziennik/sync/UpdateDownloaderService.kt
new file mode 100644
index 00000000..4b7f4342
--- /dev/null
+++ b/app/src/play/java/pl/szczodrzynski/edziennik/sync/UpdateDownloaderService.kt
@@ -0,0 +1,23 @@
+/*
+ * Copyright (c) Kuba Szczodrzyński 2022-2-21.
+ */
+
+package pl.szczodrzynski.edziennik.sync
+
+import android.app.IntentService
+import android.content.Intent
+import android.widget.Toast
+import pl.szczodrzynski.edziennik.utils.Utils
+
+class UpdateDownloaderService : IntentService(UpdateDownloaderService::class.java.simpleName) {
+
+    override fun onHandleIntent(intent: Intent?) {
+        try {
+            Utils.openGooglePlay(this, application.packageName)
+        }
+        catch (e: Exception) {
+            e.printStackTrace()
+            Toast.makeText(this, "Nie znaleziono Google Play. Pobierz aktualizację ręcznie.", Toast.LENGTH_SHORT).show()
+        }
+    }
+}