What is an AAB (Android App Bundle)
An AAB (Android App Bundle) is a new format introduced by Google for distributing Android apps. It helps reduce app size, improve performance, and make apps load faster.
Google Play automatically converts an AAB into a smaller APK that is optimized for a user’s device.
Difference Between APK and AAB
| Feature | APK (Old Format) | AAB (New Format) |
|---|---|---|
| File Size | Larger | Smaller (optimized) |
| Contents | Includes everything for all devices | Only needed parts for each device |
| Performance | May have unused code | Loads faster and saves storage |
| Google Play Support | Supported | Recommended by Google |
| Signing | Developer signs the APK | Google signs the APK |
Why Use AAB Instead of APK?
- Smaller App Size → AAB creates optimized APKs for different devices.
- Faster App Downloads → Users get only what they need.
- Better Performance → Removes unnecessary code and resources.
- Required for Google Play → Google now requires AAB instead of APK for Play Store apps.
How to Create an AAB?
For Android (Java/Kotlin) in Android Studio:- Open Android Studio.
- Click Build → Build Bundle(s) / APK(s) → Build Bundle(s).
- Find the AAB file in app/build/outputs/bundle/release/.
For Flutter Developers:
- Open Terminal or Command Prompt.
- Run this command:
- The AAB file will be saved in build/app/outputs/bundle/.
How to Upload an AAB to Google Play Store?
- Go to Google Play Console.
- Select your app.
- Click Release Management → App Releases.
- Upload the .aab file instead of an APK.
- Complete the app details and publish.
Conclusion
- AAB is the new standard for Android apps.
- Google Play now requires AAB for publishing apps.
- AAB makes apps smaller, faster, and more optimized.
- You can still test your app using an APK before publishing.