About the game
Sudoku the way it should be: a clean board, clear numbers and nothing in the way. Pencil in your candidates, undo freely, and ask for a gentle hint when you are stuck.
Five levels, from a quick break to a proper workout, each graded by the techniques it actually takes to solve, not just how many squares are empty. Every puzzle has exactly one solution.
Play the daily puzzle, share any puzzle with a short code, and track your times. It all works offline, with no account and no ads.
What's inside.
Five honest levels
Quick, Easy, Normal, Hard and Expert, graded by the techniques each puzzle needs.
A daily puzzle
Easy on Monday, hardest at the weekend, and the same board for everyone.
Gentle hints
Stuck? A nudge in the right direction, not the answer.
Notes and undo
Pencil in candidates, erase, undo. Everything you expect, nothing you do not.
Share a puzzle
Every puzzle has a short code like N4F7-K2QX. Send it and a friend gets the same board.
Offline, always
No internet, no account, no ads. Just you and the grid.
Playable demo
A tiny Sudoku to warm up.
Every row, column and 2×2 box holds 1 to 4 once.
Like it? The real thing has a lot more. Get it free on Google Play
Take a look.
6 screens · keep scrolling
Phones and tablets
Made for the big screen, too.
Under the hood
How we built it.
There is no server. Puzzles are carved from random grids on the phone in about a millisecond each, checked for a unique solution and graded by a solver. The daily puzzle is seeded from the date, so everyone gets the same board without asking anyone.
More for nerds
