chess.com app!
no idea about shredder app and its strength.
droidfish app strength will depend on type of uci engine installed for ex- if you install critter,komodo e.t.c they will have different strength and style.the default engine is stockfish whose strength is 3200+ . but depending upon hardware engines may be around 2400-3200+.
Which is better to play in android phone? 1.Shredder 2.Droidfish Which is stronger????