This app instantly calculates your current shanten count from a 13-tile mahjong hand and shows all improvement tiles to help advance your hand.

Fully supports melded hands (Pon, Chi, Kan), making it ideal for both solo practice and study of complex real-game situations. Whether you're a beginner or a veteran, it's your go-to mahjong tool to sharpen your strategy.

・Key Features

Real-time shanten number calculation for 13-tile hands

Full support for melds: Chi, Pon, Kan (open and closed)

Automatically highlights effective tiles that reduce shanten

Clean and responsive tile interface with auto sort

Undo, reset, and meld removal functions for easy testing

・Ideal For:

Practicing mahjong hand-building

Beginners learning the basics of hand progression

Intermediate and advanced players studying yaku or defense

Preparing for Tenhou, Mahjong Soul, Riichi City, and more

Improve your hand-reading skills and take your mahjong game to the next level!