Sudoku - Classic Puzzle - OS

OSDev

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About this game

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.

What’s new

Bug fixes and performance improvement