> Almost all Android apps rely on the closed-source GMS for essential functionality (eg: push notifications). There is a very fine repository of fully-free And

> Almost all Android apps rely on the closed-source GMS for essential functionality (eg: push notifications). There is a very fine repository of fully-free Android apps hosted at https://f-droid.org https://f-droid.org. Further, I would argue that "almost all" Android apps that are free software can easily be tweaked to not rely on Google Play Services. Non-free Android apps will not be made any better by becoming nonfree GNU/Linux apps.