Sudoku Offline - Classic

Solve the grid. Calm your mind. ✏️

Sudoku is the classic 9x9 number puzzle, built to be clean, fair, and fully offline. Fill every row, column, and 3x3 box with the digits 1 to 9. Easy to learn in seconds, deeply satisfying to master.

✨ WHY YOU WILL STAY
- Four difficulties: Easy, Medium, Hard, and Expert, with 120 hand-verified puzzles each
- Every puzzle has exactly one solution, verified by our own solver, so a board is never ambiguous or guess-only
- 📅 A fresh Daily Challenge every day with a calendar and streaks to keep
- Pencil notes with auto-clear: place a number and it disappears from the notes of every cell that can no longer hold it
- 💡 Smart, toggleable assists: highlight the selected row, column, and box, glow matching numbers, and show how many of each digit remain
- Fully offline: play on a plane, on the subway, anywhere with no wifi
- 🎨 Four hand-tuned themes: paper, slate, sepia, and midnight, all free
- Gentle haptics and satisfying sounds

🤝 MADE TO BE FAIR
No timer pressure (the clock is there if you want it and hides if you do not) and no pay-to-win. A mistake limit keeps you honest, but you set it: turn it off in Settings if you just want to relax. Your first hint each puzzle is free, and you earn stars for solving with few hints and no mistakes.

✈️ NO WIFI, NO PROBLEM
The whole game works offline. The puzzle packs, the daily challenge, and your progress never need a connection.

🌍 Play in 33 languages. Your progress stays on your device.

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