I use Lichess. It's great. Chess.coms official app is good too.

Depends on your level and purpose. If you are looking for serious improvement or analyzing your games, the app "analyze this" is the best one, it has stockfish 11 engine with it. Droidfish chess is also a good app for viewing games. If you are into playing online, "Lichess" is the best out there. Chess.com and Chess 24 also have their own apps. For simple recreational games, most apps on play store are fine.

Chess.com There’s Chess24 too..I don’t like it as much as chess.com though