Coming to iOS
One Sudoku a day,
the same for everyone.
Everybody gets the identical puzzle each day, and the only thing that separates you is how fast you finish it. Solve it, file your time, and see where you land.
Daily
One puzzle, released at midnight in your own timezone. No difficulty setting — the daily is the daily, and everyone is solving the same grid you are.
Your time goes on a leaderboard of the day’s fastest solves, and a calendar keeps the month you have cleared.
Classic
Endless puzzles across four difficulty bands, for when one a day is not enough. Easy and Medium are open from the start; Hard opens after two Medium wins, Expert after four on Hard. Play as many as you like — nothing expires.
Classic solves are recorded separately, so practising never touches your daily run.
Hints, coins, and Plus
Every puzzle starts with one free hint, and it needs no account, no purchase and no ad. A hint is a short lesson rather than an answer: it walks you through the rule that cracks the square, and only then fills it in.
After that a hint costs 10 coins, and if you are short of 10 the game offers you one ad for one hint instead, so being out of coins never stops you. Coins also cover Auto notes at 15 for the 3×3 box you are working in, and opening a day you missed at 25 — though one ad opens that day too. You can earn coins by watching ads at 5 a time, or buy them if you would rather not. Neither is required to play.
Sudoku Hurdle Plus is a subscription that removes the banner and the full-screen ads, opens every past daily, and starts every board with ten free hints instead of one — the daily included. The leaderboard ranks on solve time alone. A one-time Remove Ads purchase does the ad half on its own, and either way the rewarded ads you choose to watch stay available.
You do not need an account
The game works from the moment you open it. Signing in is optional, and the only reason to bother is portability — it saves your coins, streak and puzzles to an account so you can carry them to another device or get them back after a reinstall.
If you do sign in, you can sign back out or delete the account from inside the app. The privacy policy sets out exactly what is kept and what is not.