334 on Nostr: I'm using #GraphineOS. Is there a way to download an apk so I don't have to use the ...

I'm using #GraphineOS. Is there a way to download an apk so I don't have to use the google play store? Also, is Fountain closed source? If so, any plans to be open source in the future? I'm striving to use open source as much as possible, so right now it's #AntennaPod for me.