When your users keep your app up to date on their devices, they can try new features, as well as benefit from performance improvements and bug fixes. Although some users enable background updates when their device is connected to an unmetered connection, other users might need to be reminded to install updates. In-app updates is a Google Play Core libraries feature that prompts active users to update your app.
The in-app updates feature is supported on devices running Android 5.0 (API level 21) or higher. Additionally, in-app updates are only supported for Android mobile devices, Android tablets, and Chrome OS devices.
Note: In-app updates are not compatible with apps that use APK expansion files (.obb files).