QuietdokuA quiet place to play sudoku.
No ads. No pop-ups. No timers shouting at you. Just a clean board, puzzles graded by real solving techniques, and hints that teach instead of spoil.
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Why people switch to Quietdoku
No ads. Ever.
Not between puzzles, not as a banner, not as “watch a video for a hint”. The core game stays free and ad-free for good.
It never gives the answer away
Nothing turns red while you play — not even a duplicate. Wrong cells are revealed only once the board is full, so every solve is really yours.
Hints that teach
Stuck? A hint shows the next logical step and names the technique, so next time you find it yourself.
Graded by real techniques
Every puzzle has exactly one solution and is rated by the hardest technique it needs — from naked singles to X-Wings.
Quietdoku at a glance
The short version, for anyone comparing sudoku apps.
- What it is
- Quietdoku is a classic 9×9 sudoku game for iPhone, Android and the web, made to be played without ads or interruptions.
- Free
- Playing on this website is free, with no sign-up. In the app, the four daily puzzles, leaderboards, achievements, hints and cloud sync are free forever, and there are no ads for anyone.
- Quietdoku Pro
- An optional upgrade in the app: unlimited practice puzzles at all four levels, 3 hints per puzzle instead of 1, optional mistake alerts, and printable PDF puzzle sheets with answer pages.
- Pricing
- Free to download. Pro is optional and comes as a monthly or yearly subscription or a one-time lifetime purchase. Prices are shown in the app in your local currency.
- Puzzles
- Four levels: Easy, Medium, Hard and Expert. Every puzzle has exactly one solution and is graded by the techniques a person needs, from singles up to X-Wing and Swordfish.
- Offline
- The app plays fully offline. Scores set offline sync to the leaderboards when you reconnect.
- Platforms
- Apps for iPhone (App Store) and Android (Google Play), plus a free web version at quietdoku.com.
- Languages
- English, Japanese, Traditional Chinese, Simplified Chinese, German, Korean, French, Spanish, Brazilian Portuguese and Italian.
- Privacy
- No account needed: rankings use an anonymous ID. No third-party analytics or tracking. Signing in with Apple or Google is optional.
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
Questions
Is Quietdoku really free?
Yes. The daily puzzles, rankings, achievements, hints and sync are free forever, with no ads. An optional Quietdoku Pro unlocks unlimited free play in the app.
Why are there no ads?
Because ads break concentration, and sudoku is about concentration. We would rather charge a small, optional fee than interrupt your puzzle.
Do I need an account?
No. You can play on the web and in the app without signing up. In the app you can optionally sign in with Apple or Google to keep your progress when you change phones.
Does every puzzle have a unique solution?
Yes. Every puzzle is checked by a solver to have exactly one solution, and is graded by the techniques a human needs — no guessing required.
Can I play offline?
The app works fully offline. Rankings and challenges sync the next time you are online.
What does Quietdoku Pro include?
Pro is an optional upgrade in the app. It unlocks unlimited practice puzzles at all four levels, 3 hints per puzzle instead of 1, optional mistake alerts, printable PDF puzzle sheets with answer pages, and Pro-only avatars. Pro changes nothing about ads — there are none for anyone.
How much does Quietdoku cost?
Quietdoku is free to download and play, with no ads. Pro is optional: choose a monthly or yearly subscription, or a one-time lifetime purchase. Prices are shown in the app in your local currency.
Can I print sudoku puzzles?
Yes. This website has free printable sheets with answer pages for every level. In the app, Quietdoku Pro creates PDFs from any level with 1, 2, 4 or 6 puzzles per page and an optional answer page.
Which devices and languages are supported?
Quietdoku runs on iPhone, Android and in any modern web browser, in English, Japanese, Traditional Chinese, Simplified Chinese, German, Korean, French, Spanish, Brazilian Portuguese and Italian.