Sudoku - Classic Number Puzzle

Enjoy the world's favorite number puzzle in a clean, calm and completely free app. No ads, no sign-up and no internet connection needed. Just you and the puzzle.

🧩 PUZZLES THAT PLAY FAIR
Every Sudoku has exactly one solution and can be solved with logic alone, so you never have to guess. Puzzles are graded by the real solving techniques they need, not just by how many numbers are given:
• Easy – perfect for beginners
• Medium – a relaxing challenge
• Hard – needs some strategy
• Expert – for experienced solvers
• Master – advanced techniques like Swordfish and XYZ-Wing
• Extreme – the ultimate test

💡 HINTS THAT TEACH
Stuck? A hint doesn't just fill in a number. It shows you the next logical step and explains why it works, from Hidden Singles and Pointing Pairs to X-Wings and XY-Wings. It's the easiest way to become a better solver.

📅 DAILY CHALLENGES
A fresh puzzle every day, the same for everyone around the world. Fill your calendar, build your streak and replay any day you missed.

✏️ EVERYTHING YOU NEED TO SOLVE
• Notes (pencil marks) and one-tap Auto notes
• Notes clear automatically when you place a number
• Highlights for the row, column, box and matching numbers
• Duplicate and mistake checking (you can turn it off)
• Unlimited undo, erase and restart
• Quick fill: long-press a number to lock it, then tap cells
• Remaining count on every number button
• Timer with pause; games auto-save so you can continue anytime

📊 TRACK YOUR PROGRESS
Best and average times, win rate, perfect games and win streaks for every difficulty level.

🎨 MADE FOR EVERYONE
• Light and dark mode, 6 color themes, plus wallpaper colors on Android 12+
• Works great on small phones, large phones, foldables, tablets and Chromebooks, in portrait and landscape
• Full hardware keyboard support
• Screen reader (TalkBack) support
• 15 languages: English, Español, Português, Français, Deutsch, Italiano, Русский, Türkçe, Bahasa Indonesia, Tiếng Việt, हिन्दी, العربية, 日本語, 한국어 and 简体中文

🔒 PRIVATE BY DESIGN
The app collects no data at all. Your games and statistics stay on your device, and the app doesn't even request internet access.

Train your brain, one number at a time. Download Sudoku and start your streak today!