iPhone & iPad
Backgammon, and nothing else.
Every roll is cryptographically verifiable. Matchmaking is by skill. One tap gets you into a game. There is nothing else bolted on.
Dice you can audit
The server commits to every roll before it is made and reveals it afterwards, signed, so it cannot be changed once you have seen it. Open the match menu and choose Verify dice to check a game yourself — no trust required.
Opponents your own strength
Matchmaking is rating-based, so a beginner is not thrown at a veteran. Ratings use the FIBS system, moving quickly while you are new and settling as you play. Global and regional leaderboards show where you stand.
The whole game
Doubling cube, gammons and backgammons, the Crawford rule, match play or a single game. Drag or tap to move, undo before you commit, and turn on auto-roll and auto bear-off when you want it to keep up.
Chat that cannot be abused
A short list of set phrases and a few emoji — enough for “good roll” or “well played”, and impossible to use for anything else. Mute it entirely if you prefer silence.
What it does not have
- Loot boxes
- Coins, gems or any currency
- Energy timers
- Power-ups
- Pay-to-win
- Ads during a game
Ads support the app. A single $0.99 purchase removes them permanently, and it is the only thing ever sold.
How the dice work
Before a game starts the server generates a secret seed and publishes its hash. Each roll is derived from that seed with HMAC-SHA256 and the roll number, using rejection sampling so all six faces are exactly equally likely. At the end of the game the seed is revealed. Anyone can recompute every roll and check it against the hash published at the start — if a single die had been altered, the hashes would not match.
This is why the app can say the dice are fair without asking you to take its word for it.