Sudoku Smart: Number Puzzle

Sudoku Spark brings the world's favorite number puzzle to life in a clean, fast, beautifully designed app you can play anywhere — at home, on the train, or fully offline with no Wi-Fi. Whether you have never filled a grid before or you hunt down the toughest puzzles for fun, the perfect challenge is waiting for you.

LEARN SUDOKU THE EASY WAY
New to the game? Learn Sudoku step by step. A built-in tutorial and smart hints teach you how to play, explain every rule, and reveal the techniques that turn beginners into confident solvers — naked singles, hidden pairs, pointing pairs and more. Easy Sudoku puzzles are perfect for relaxing, building confidence and learning at your own pace.

A DIFFICULTY FOR EVERY PLAYER
Pick from six carefully balanced levels:
• Easy Sudoku — gentle, relaxing grids for beginners and casual play
• Medium — a satisfying everyday brain teaser
• Hard Sudoku — sharpen your logic and your speed
• Expert — demanding puzzles that reward real strategy
• Extreme Sudoku — only the most fiendish grids, for the bravest minds
• Master — Sudoku for pro players who want the ultimate test
Every puzzle is hand-checked to guarantee one unique solution — no guessing, ever.

FEATURES YOU'LL LOVE
• Thousands of free Sudoku puzzles, with new ones added regularly
• Daily Challenge with a collectible calendar of trophies
• Smart hints when you get stuck — learn as you play
• Auto-notes (pencil marks) so you can plan moves like a pro
• Mistake-limit mode or relaxed unlimited mode — you choose
• Highlight duplicates, undo, erase and lightning-fast number input
• Detailed statistics: best times, win streaks and progress
• Beautiful light and dark themes and a distraction-free board
• Play 100% offline — no internet required, ever

GREAT FOR YOUR BRAIN
Sudoku is a fun, relaxing way to train concentration, memory and logical thinking. A few puzzles a day keep your mind sharp — whether you are a student, a busy professional, or simply love numbers. From easy Sudoku for a calm coffee break to extreme Sudoku for a serious workout, Sudoku Spark grows with you.

Download Sudoku Spark free and start solving today — from your very first easy grid to expert and extreme puzzles built for pro players!

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