The Best

This is the best mahjong game currently available in the AppStore. The online play has many players for quick matching. And it has different modes offering a game of varying speed.
The single player offers offline play with unlock able characters, differing lengths of game and a survival mode. As of the newest version, the final unlockable opponent has the strongest AI of any computer mahjong I have yet played. A refreshing challenge!

TsunamiNoAi about 麻雀 天極牌 - 初心者から楽しめる本格麻雀ゲーム!