Press kit

Mahj Dragon is four-player mahjong for iPhone and iPad: nine games, each played by its own written rules, with three levels of computer opponent, all trained by us, and a teacher who explains her advice. It is the third app from OK By Us, after Buzzer Party and Boomjack.

The facts

Name: Mahj Dragon
Developer: OK By Us (Stewart Range)
Platforms: iPhone and iPad, iOS or iPadOS 17 or later
Availability: On the App Store on 19 November 2026, with a pre-order page before then
Price: Free to download, with a free 30-day trial of everything. After that, one purchase, the Full Game, keeps every game playable for good: $14.99. The Learning Center, the Atlas, every game's rules and joining a friend's table stay free. No subscription, no ads.
The nine games: Ma Que — The Sparrow, Hong Kong Classical, The 1920s Export Set, Singapore & Malaysian, Taiwanese 16-Tile, Sichuan Bloody-End, Riichi, American, Vietnamese
Opponents: Three levels in every game, Level 1, Level 2 and Level 3, all trained by us
Playing together: Up to four people, each on their own device, in the same room. Wi-Fi and Bluetooth on; no internet, no accounts, no server.
Privacy: Nothing collected. No accounts, ads, analytics or tracking.
Website: mahjdragon.okbyus.com
Press contact: info@okbyus.com

What it does

Mahjong is played differently almost everywhere it is played. Mahj Dragon has nine of those games, from Shanghai about 1920 to Hong Kong, Taiwan, Chengdu, Tokyo, Singapore, Saigon and New York, and plays each one by its own rules, taken from written sources for that game: how a hand wins and how it scores.

Each game has three levels of computer opponent, all trained by us. At every table the Dragon, the app's teacher, will read your rack, suggest a throw and say why; a rules card is one tap away. The Learning Center starts from nothing, with two guided first hands, six drills, a glossary and fifty stories from the game's history, with the myths labelled as myths. The Tile Set Atlas visits the nine sets and the places they come from.

The American game uses the app's own card, the Dragon House Card: fifty hands written for Mahj Dragon. Friends in the same room can play together on their own iPhones and iPads, with the devices talking straight to each other: no internet, no accounts, nothing collected.

Pictures

Free to use in coverage of Mahj Dragon. Tap a picture for the full size.

The Dragon suggests a throw and explains why (iPhone) — Every suggestion, explained (iPhone)

The Learning Center, with Your First Game (iPhone) — Learn to play in one hand (iPhone)

The three moves that work the table (iPhone) — Three moves and you're playing (iPhone)

The Dragon offers a teaching hand (iPhone) — Never played? Start here (iPhone)

The history wing of the Learning Center (iPhone) — A museum in your pocket (iPhone)

A game at the table on iPad — Mahjong at full size (iPad)

The home screen, with HOST, PLAY and LEARN (iPad) — The table is already set (iPad)

App icon

Wordmark (PNG, transparent)

Download the press kit (the icon, the wordmark and all seven screenshots, with the facts). Larger or newer pictures from info@okbyus.com.