Calm Sudoku · 静心数独

Quiet Sudoku for everyday calm. No ads, ever. Large, readable numbers, calming themes, daily puzzles, smart hints, offline play, 4 difficulty levels, and 18 languages.

Calm Sudoku is a quiet, ad-free sudoku app built for everyday focus and unwinding. It is comfortable for first-time solvers, longtime sudoku fans, and anyone who wants a cleaner, easier-to-read puzzle experience.

No ads. Not now, not later. The free experience is calm by design.

WHAT'S INSIDE • Daily Puzzle: one fresh sudoku every day • Four difficulty levels: Easy, Medium, Hard, and Expert with Premium • Smart hints: see the logic, not just the answer • Notes mode: pencil in candidates with one tap • Auto-save: leave and continue any puzzle later • Personal stats: best times, streaks, and weekly activity • Localized interface: English, Simplified Chinese, Traditional Chinese, Japanese, Spanish, Portuguese, Korean, Indonesian, Ukrainian, Vietnamese, Arabic, French, and Malay • Large, readable numbers with calm color themes • Offline play: puzzles and progress stay on your device

DESIGNED FOR COMFORT Calm Sudoku is made to be readable in low light, gentle on the eyes, and forgiving when you tap the wrong cell. The board uses generous spacing, clear contrast, and large digits so you can focus on the puzzle instead of the interface.

CALM SUDOKU PREMIUM A one-time, no-subscription unlock adds: • Expert difficulty • 2,000+ additional puzzles • Unlimited hints • Advanced statistics • Daily puzzle archive for the previous 30 days

Premium is a single purchase. No subscription. No auto-renewal.

PRIVACY Calm Sudoku does not collect, store, or transmit personal data. No account, no analytics, no tracking. Progress stays on your device.

Questions or feedback? Email team.emitu@gmail.com.