Looking for mahjong rules instead of app help? See the Mahjong Dealer FAQ or the full dealing guide.
Tap Roll and two independent dice rolls happen at once — one silently decides the dealer (that seat becomes East for this hand), a separate roll decides the wall break. The light sweeps around the table and settles on the wall that broke — not always the dealer's own — and a tile lights up there with a small arrow showing which way to push that stack into play. Start dealing from that exact tile.
Next Dealer passes the deal to the next seat counterclockwise, the normal case after a hand ends. East Retains is for when East wins and stays dealer — seating doesn't change, but you still need a fresh roll for the new wall break, which is what this button gives you.
Each roll is meant to represent a single hand in progress. When you reopen the app, it's ready for a fresh roll rather than showing you stale results from your last game.
Yes — the entire app runs on your device with no network calls at all. It works exactly the same in airplane mode.
Tap the menu icon in the top-left corner and choose a theme under "Table Theme." Your choice is remembered automatically the next time you open the app.
Both, with the real rules for each — pick Chinese or American in the menu and the app follows that ruleset's actual dealer and wall-break mechanics, which genuinely differ. See the How to Deal guide for the details. American also has an optional Blanks toggle for the non-tournament house-rule tile count.
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