Sudoku - Classic Puzzle - OS

Sudoku OS — Master Your Mind

Whether you're picking up Sudoku for the first time or you're a seasoned solver, Sudoku OS delivers a clean, distraction-free experience built for every level of player.

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🧩 FIVE DIFFICULTY LEVELS
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• New User — Learn the rules at your own pace
• Easy — Warm up your mind
• Medium — Test your pattern recognition
• Hard — A real challenge awaits
• Expert — Only for true masters

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⚡ FEATURES
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• Smart hint system — use hints to get unstuck without giving everything away
• Notes mode — pencil in candidates just like on paper
• Undo — take back any move instantly
• Mistake highlighting — catch errors before they cost you the game
• Matching number highlight — tap a cell to see all matching numbers on the board
• Auto-remove candidates — keep your notes clean automatically
• Hearts system — you get 3 chances; watch a rewarded ad to restore a heart

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🎨 PERSONALISATION
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• 4 themes: Dark, Light, Midnight, Sand
• 5 accent colours to match your style
• 3 board number sizes: Small, Medium, Large
• Sound effects and haptic feedback toggle

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📊 STATS & ACHIEVEMENTS
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• Track wins across every difficulty
• View your best times
• Unlock achievements as you improve

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🔒 PRIVACY FIRST
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Your game progress and settings are stored locally on your device — they never leave it. No account required. No sign-up. Just Sudoku.

SudokuOS is free to play and supported by ads. Rewarded ads are always optional.

Download Sudoku OS and start sharpening your mind today.