F-droid sort of blows... I've just been providing apks for stuff and folks can use Obtanium.

Are you claiming something cant be open source unless its in the F-Droid store? Kind of arbitrary and illogical lol

Obtainium is good, but don't forget to verify the signatures of the release before you install stuff. Most people put the SHA256 hash of their release on their GitHub. You can verify with Hash Checker on Android for example. Don't trust, verify