Zenoku: Sudoku

Zenoku is Sudoku the way it should be: beautiful, fast, and completely free of ads. No banners, no videos, no interruptions — ever.
CLASSIC SUDOKU, BEAUTIFULLY INKED
A crisp, newspaper-inspired design that stays out of your way. Every puzzle is generated with exactly one solution — you never have to guess.
FIVE LEVELS, EASY TO EXTREME
From relaxed morning solves to puzzles that demand real technique. Each level has its own rules for mistakes and hints.
A NEW CHALLENGE EVERY DAY
One daily puzzle, the same for every player in the world. Difficulty climbs through the week — build your streak and keep it alive.
SMART TOOLS THAT KEEP UP WITH YOU
• Pencil notes that clean themselves — place a number and it disappears from the notes of every related square
• Tap any number to light up every copy on the board
• Row, column, and box highlighting as you play
• Undo, erase, and hints (they cost points — spend them wisely)
COMPETE AND PROGRESS
• Game Center leaderboards for every level — best score and best time
• A milestones gallery full of goals to chase, with live progress
• Lifetime statistics: win rates, best times, perfect games, streaks
• Satisfying celebrations when you complete a row, column, or box
MADE TO RESPECT YOU
• No ads, no subscriptions, no paywalls — the whole game is free
• No account, no sign-up — your progress lives on your device
• No data collected. Period.
• Works completely offline
Pick up Zenoku for two minutes or two hours. The puzzle is waiting — and nothing else is.