UBO 13Cards is a stand along app for android and iOS.
There are very strong AI system that should never see before.
English and Chinese are supported.
Four game modes for playing.
1.Face Off mode
   1 on 1, AI play the same 13 hand cards with you.
2.General Mode
   Play game with 3 AI players. 
3.Defeat Mode
   Play game with 3 AI players.
   Defeat opponent (FRONT,MIDDLE,BACK all win) or is tie.
4.Expert Mode
   Assist buttons are disabled.