Built for the American Mah Jongg community
RSVP Mah Jongg! takes the headache out of running an American Mah Jongg event or charity fundraiser. Instead of wrestling with spreadsheets and hand-drawn seating charts, you set your player count and number of rounds, and the app instantly generates a wind-optimized rotation — every player gets East, South, West, and North exactly once.
Players RSVP in one tap with a six-character code or QR link, claiming their own seat — no app to download, no account required. As rounds finish, scores push to every player’s phone in real time, and the leaderboard runs itself. Hosts can preview and publish the seating, print player cards ahead of time, seat walk-ins from a waitlist, and return to any saved event from the My Events dashboard. When the last round ends, complete the event to lock in the final standings.
Events for up to 8 players are always free. Larger events use tokens — you buy them once, they never expire, and unused tokens are refundable within 30 days. No subscription, no recurring charges.
RSVP Mah Jongg! is built and run by 5280 Factory Labs. Have a question or a feature request? Email 5280factorylabs@gmail.com.