Quiet Sudoku: Classic Puzzles

Play classic Sudoku without ads or interruptions. Quiet Sudoku works offline and explains the next logical step when you get stuck—so you can enjoy solving and learn along the way.

CLASSIC SUDOKU, AT YOUR PACE Choose Easy, Medium or Hard, with puzzles rated by the techniques needed to solve them. Every puzzle has one solution and a verified logical path. There is no mistake limit, and the timer is optional. Open the app to continue an unfinished game or start today's puzzle.

HINTS THAT EXPLAIN First see where to look. Then follow the reasoning and decide whether to apply the step. The guide works with your actual board. Learn four useful techniques and practice them on different positions, with guided answers recorded separately from independently correct attempts.

COMFORTABLE NUMBER ENTRY Use pencil notes, automatic note cleanup, undo and redo. A compact number row keeps the board in view. Prefer bigger targets? Choose large number keys or enlarge a 3-by-3 box in Focus view. A clear notes-mode indicator helps you know whether you are entering an answer or a candidate.

A DAILY HABIT, WITHOUT PRESSURE Solve the daily puzzle, revisit completed days or catch up on the past year. Optional local reminders respect your choice; finishing today's puzzle cancels its upcoming reminder. Track your completed puzzles and progress by difficulty.

MADE FOR IPHONE AND IPAD Enjoy a larger board in iPad portrait and tools beside the board in landscape. Choose a light paper theme or a dark chalkboard. Local progress saves automatically. Optional iCloud checkpoints let you open a recent game from another device as a separate copy, keeping both devices' progress safe.

No ads, subscriptions or in-app purchases in this version. No account registration required. Available in English and Simplified Chinese.

Discovery signals