Introduction
About Sudoku
Sudoku — The Classic Number Puzzle, Perfectly Made.
Rediscover the timeless logic puzzle you love, refined for modern devices with smooth controls, beautiful themes, and endless replayability. Whether you are a first-time player or a seasoned expert, this is the Sudoku experience you have been waiting for.
Core Features
🔢 Authentic Gameplay
True to the classic rules — fill a 9×9 grid so that every row, column, and 3×3 box contains digits 1 through 9 exactly once. Tap to place numbers, use pencil notes for candidates, and let logic guide you to the solution.
🎯 5 Difficulty Levels
Five carefully calibrated difficulties with different numbers of given cells:
| Level | Given Cells | Description |
|---|---|---|
| Easy | 45 | Great for beginners and quick games |
| Medium | 36 | A balanced challenge for casual players |
| Hard | 31 | Requires logical deduction techniques |
| Expert | 27 | For experienced solvers who want a real test |
| Master | 24 | The ultimate challenge — only for the bravest |
Each puzzle is uniquely generated — no two games are ever the same.
📱 Universal App
One purchase works on iPhone, iPad, and Mac. Native controls for each platform — touch gestures on iOS, mouse and keyboard on Mac. Your progress syncs via iCloud across all your devices.
💡 Hints & Notes
- Hint: Stuck? Get a hint that reveals one correct cell without spoiling the whole puzzle.
- Pencil (Notes): Toggle pencil mode to jot down candidate digits in empty cells. Pencil marks in peer cells (same row/column/box) auto-clear when you place a number.
- Error Checking: Optional highlighting of incorrect entries so you can learn from mistakes.
- Undo: Full undo support — take back any move, anytime.
🏆 Daily Challenge
A fresh puzzle every day at the Master difficulty level. Build a streak and track your daily progress on the calendar view in Statistics.
📊 Statistics
Track your performance: total games played, win rate, current streak, best streak, and per-difficulty breakdowns including best times and averages. Synced via iCloud.
🎨 8 Beautiful Themes
Personalize your board with eight handcrafted color themes: Classic, Midnight, Paper, Forest, Ocean, Sunset, Lavender, and Rose. Each theme provides a distinct visual experience while maintaining excellent readability.
☁️ iCloud Sync
Your settings, statistics, game saves, and daily challenge progress automatically sync across all your Apple devices via CloudKit. Start a game on your iPhone, continue on your Mac.
🎮 Game Center
Compete on leaderboards with your best completion times, and earn achievements: First Solve, Easy Clear, Medium Clear, Hard Clear, Expert Clear, Master Clear, and Flawless (complete without hints or errors).
🔇 Clean & Ad-Free
No interruptions, no pop-ups, no ads, no in-app purchases. Just pure, focused puzzle gameplay.
🌍 25 Languages
Switch languages at runtime from Settings without restarting the app. Supports English, Chinese (Simplified & Traditional), Japanese, Korean, French, German, Spanish, Italian, Russian, Portuguese, Dutch, Vietnamese, Thai, Hindi, Turkish, Greek, Finnish, Norwegian, Danish, Hungarian, Indonesian, Malay, Ukrainian, and German (Switzerland).
🔊 Sound Effects
Subtle sound effects for number placement, hints, errors, and victory — toggle on or off in Settings.
🖨️ Print Puzzles
Print puzzles directly from the Mac app with difficulty selection and optional answer keys. Perfect for offline solving with pen and paper.
System Requirements
- iPhone/iPad: iOS/iPadOS 16.0 or later
- Mac: macOS 15.0 (Sequoia) or later (Apple Silicon)
- Storage: ~50 MB
Privacy
Sudoku is offline-first for core gameplay. All game data is stored locally and synced to your personal iCloud account only. No ads, no analytics, no third-party tracking. The only network features are iCloud sync, Game Center, and an optional "More Apps" section in Settings.
See the Privacy Policy for details.
Getting Started
If you're new to Sudoku, start with the Installation Guide to get the app on your device.