Classic Sudoku Offline

Sudoku, at your own pace.

Classic Sudoku keeps the feel of the puzzle page in a daily paper: wide, crisp digits, hairline rules, a restful ivory background. Open the app, solve, put it down.

LARGE PRINT, EASY ON THE EYES
• Three text sizes, adjustable at any moment, applied everywhere in the app
• Light theme, dark theme, or automatic by time of day
• High-contrast serif digits, drawn for long stretches of reading
• Wide touch targets: tap where you mean to, without landing on the wrong cell

PUZZLES THAT KEEP THEIR PROMISE
• Every puzzle is generated on your device and checked: it has exactly one solution, reachable by logic alone
• Five difficulty levels, all open from the first launch: Beginner, Easy, Medium, Hard, Expert
• Nothing to unlock, no puzzle to wait for

NOTHING INTERRUPTS YOU
• The mistake limit is a setting, switched off by default: one slip does not cost you twenty minutes of thinking
• The timer stops when you pause and when you leave the app
• No account to create, no connection needed, no permissions requested

EVERYTHING YOU NEED TO SOLVE
• Pencil-mark notes, eraser, hints, undo
• Highlighting for the row, column, box and matching digits — can be switched off
• A remaining count on every number key
• Your game in progress comes back on its own, even after you close the app

YOUR PROGRESS
• Daily challenge: the same puzzle for everyone, generated on your device
• Statistics: puzzles completed, personal records per level, day streak
• A level path and achievements, quietly presented

YOUR DATA STAYS WITH YOU
Puzzles, settings and statistics are stored in the app's private space on your phone. Nothing is sent anywhere. Uninstalling erases all of it.

The app works entirely offline, puzzle generation included.

Available in English, French, German and Spanish.