RedReader is a fantastic reddit mobile client for Android - they are rolling out a new version right now with a ton of community contributions (both bugfixes and new features).
https://old.reddit.com/r/RedReader/comments/o7oxdu/version_1...
https://old.reddit.com/r/RedReader/comments/o7oxdu/version_1...
Available under GPLv3 ever since I remember, and always had fantastic UX (assuming RedReader has reached parity with latest update)