Unlike other inbound Android 12 features, the app hibernation tool hasn’t appeared in past Developer Preview builds. However, XDA Developers were able to confirm the feature’s inclusion in Android 12 thanks to a leaked build of the OS they managed to obtain.
The site said the upcoming app hibernation feature will expand upon the ‘unused apps’ concept and Settings page added with Android 11. Besides removing temporary files, the leaked Android 12 feature will also automatically revoke permissions for unused apps.
Given that it’s only select app data that will be getting deleted, the amount of space users end up saving will likely be minimal.