Scan any Sudoku.
Learn the logic.
Point your camera at a puzzle in the newspaper, a book or on another screen. Masu reads it in seconds, then lets you solve it, check your answers, or take a hint that explains the technique.
Coming soon on the App Store
Scan & solve
Printed, on screen or handwritten. Solve, Check, Hint or keep playing it in the app.
Hints that teach
Every hint names the technique, from hidden singles to X-Wing and Swordfish.
A daily ritual
A fresh Daily Sudoku, four levels, streaks, stats and Game Center.
Puzzle recognition runs entirely on your iPhone or iPad: your photos and puzzles are never uploaded. Privacy policy.
Masu (マス) is Japanese for a single square of a grid, the place every Sudoku begins.