Sudoku:
A clean, distraction-free Sudoku for iPhone and iPad — pencil notes, hints, show, check, and a built-in strategy guide, all at your fingertips.
Pure logic
Every puzzle has exactly one solution and can be solved by logic alone — you never need to guess.
Five difficulty levels
Play from Simple to Expert. Each level caps the hardest solving technique a puzzle will ever require, so the challenge grows gradually.
Pencil notes
Jot down candidates in any cell without committing. Switch between pencil mode and final entry with a single tap.
Hint, Show & Check
Stuck on a cell? Hint points you to a good next move, Show fills it in for you, and Check highlights any wrong digit currently on the board.
Built-in strategy guide
Learn the classic solving techniques — from Naked Singles and Hidden Pairs up to X-Wing, XY-Wing, Coloring and Forcing Chains — right inside the app.
Challenge Mode
Disable all help and put your skills to the test. Wrong entries are flagged immediately — three mistakes and the game ends.
Light & dark mode
Follow your system appearance or force light or dark mode. The 3×3 blocks stay clearly visible in either theme.
iCloud sync
Your game history and preferences sync across your iPhones and iPads via your private iCloud. The in-progress puzzle stays on the device you’re playing on — each device resumes the game it last saved.
Screenshots
Game view
Hint
Strategy
Settings
Help & strategies