QuietdokuHard Sudoku
Hard puzzles need naked and hidden pairs and triples. Expect to scan candidates carefully and think a few steps ahead.
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Other levels
Easy
Singles only. Perfect for learning or a relaxed five minutes.
Play →Medium
Needs pencil marks and locked candidates. The daily default.
Play →Expert
X-Wing, Swordfish and XY-Wing. For patient minds.
Play →How to play
Sudoku takes a minute to learn and a lifetime to master. Here are the rules and the first techniques you need.
→Quietdoku for iPhone and Android
Take the quiet with you.
The app works offline and adds the parts that make a habit stick.
- Four daily puzzles, one per level
- Streaks and collectible achievement cards
- Worldwide and country rankings, seasons
- Challenge a friend with a link
- Sign in with Apple or Google to keep progress across phones
Scan to download
Free · No ads · Optional Pro for unlimited practice