Sudoku - Scan, Solve, Play

Sudoku — Scan, Solve, Play.

Scan a printed puzzle with your camera, solve any grid instantly, or play freshly-generated puzzles with hints that actually teach. A new puzzle every day, four difficulty levels, and a built-in solver that cracks even Expert grids. No account, no sign-up — the camera, solver, and generator all run on your device.

✨ Scan, solve, play — your way

📷 SCAN — Point your camera at any Sudoku from a newspaper, magazine, book, or screen. The app finds the grid and reads every digit in seconds. Review and tap to fix anything before you solve or play.

✏️ ENTER — Prefer to type it in? Punch a puzzle in by hand on a clean 9×9 board. The app checks validity as you go and tells you if a grid has no solution.

⚡ SOLVE — Get the answer to any valid Sudoku. The built-in solver handles everything from gentle starters to Expert grids that classic techniques can't crack on their own.

🎮 PLAY — Choose Easy, Medium, Hard, or Expert and a fresh, uniquely-solvable puzzle is generated for you. Beautiful board, smooth animations, helpful highlights.

📅 A new puzzle every day

Today's Puzzle gives you one fresh challenge daily, and a day-streak counter keeps the momentum going. Finish without help to earn a Clean Solve badge — no hints, no checks.

🧠 Hints that teach, not just tell

Stuck? Tap Hint to be guided in three stages:

1. The technique that applies — Naked Single, Hidden Single, Locked Candidates, Naked Pair, Hidden Pair, X-Wing, and more
2. A highlight of the exact cells involved in the pattern
3. The digit, and where it goes

You decide how much help you want — ideal for learning real strategies instead of brute-forcing the answer.

✅ Check your progress

Not sure you're on track? Tap Check to compare your filled cells against the solution — any wrong placements light up red so you can fix them and keep going.

⚙️ A polished playing experience

• Notes mode for pencil-marking candidates
• Highlight the row, column, and box of the selected cell
• Highlight every cell sharing the same digit
• Instant conflict detection — clashing cells turn red
• "Show only legal digits" toggle for newer players
• Tap a digit again to erase • Undo every move
• Built-in timer that auto-pauses when you step away
• Share your finished board with friends
• Light and dark themes that follow your phone

🌐 Your language

Available in English, 中文, and 日本語 — or follow your system language automatically.

🔒 Private by design

• Scan, solve, generate, and play all run on-device — no connection needed to enjoy the puzzles
• Camera images never leave your phone
• No account, no sign-up, no tracking by us

Free, supported by ads.

Whether you're learning advanced Sudoku techniques, want a steady stream of fresh puzzles, or just need to check that puzzle in the morning paper — give it a try.