Sudoku,one clear step at a time.

Coming to the App Store for iPhone, iPad and Mac.

A new puzzle every game

Made on your device as you start, with exactly one answer, at six levels of difficulty.

From 4×4 to 16×16, and samurai

Regular and jigsaw boxes, diagonals, windows, and boards joined into one.

2132
Classic 4×4
1253632436
6×6 · Jigsaw
58245264982777148919
9×9 · Diag
61492314571956389897128761538516463212195819656353289443978531914536197637637393226124782667118393461265942
Samurai · 5 grids

Stuck? The hint explains

A hint first points to where to look, so you can try again yourself. Then it shows the technique this step takes and why it holds. Only then does it fill in the digit.

17 techniques, an article for each →

Endless: one board into the next

Solve a board, and its bottom-right box carries into the next one's top left. Or go through joined boards one group after another, or uncover a map of nine.

On iPhone, iPad, Mac and the web

One game, laid out for each screen. Open it in a browser and play; add it to your home screen and it plays offline too.

  • AdsNone, ever
  • FeesFree to play
  • AccountsOpen it and play
  • UploadsStays on your device

Your games and records stay on your device; nothing goes online while you play.

Ready for a game?

Play in your browser