The hardest part of mahjong was never the game itself — it's getting four people, a set of tiles, and a table into the same place at the same time.
One Android phone replaces all of it. The host opens the game; everyone else scans the QR code and sits down right in the browser — iPhone or Android, nothing to download, no sign-up.
A TABLE, ANYWHERE
Living room floor, dorm room, the diner booth, outside the convenience store. And on the move it works just the same — on the train, at the airport gate, even in the air, with no internet at all. The game lives entirely on your phones. Wherever your friends are, that's the mahjong parlor.
NEVER SHORT A FOURTH
Missing a player? An AI takes the seat. Someone steps away or gets off mid-ride? The AI covers for them — three difficulty levels, and the seat is still theirs when they're back.
PLAY IT YOUR WAY
• Chinese Official (MCR): 81 scoring patterns, 8-fan minimum
• Japanese (Riichi): riichi, dora/ura-dora, honba, full half-game
• Sichuan Bloodbattle: declare a void suit, keep playing after every win until the wall runs out
• Guangdong Wildcards: flipped-tile wilds or a fixed red dragon, plus maima betting
EVERYTHING A TABLE NEEDS
• Your pace: a quick 15-minute session or a full evening half-game
• Interruption-proof: every move is autosaved; reopen the app and keep playing
• Scan back in: after a reconnect, seat, score, and tiles are exactly where you left them
REPLAYS: VIEW, EXPORT, IMPORT
• Every hand is saved automatically — open the Replay List and step through it frame by frame, so "did you really win on that tile?" is settled by the record
• Export a hand, or a whole match, as a .json file — all four rulesets. Send it to a friend, keep it for review, or import it back on another phone
• For deeper analysis: a Riichi match exports as mjai (.jsonl) for AI review tools such as Mortal, and a locally played Riichi log carries a Tenhou section you can open in Tenhou's own replay viewer
• Import what you exported: a hand replays as-is, and a whole match comes back with hand-by-hand navigation (Previous / Next hand)
A CLEAN TABLE
No ads cutting into the game, no in-app purchases, no accounts, no real-money gambling. Game data travels only between your phones, never through a server; the app collects only anonymous usage statistics, which switch off fully offline. If the host's screen locks, the game pauses — no background services; reopen the app to resume from the autosave.
Free, no sign-up. The next table is already in your pocket.
Missing a player? AI sits in. Four-player mahjong, offline, nothing to install.