Kudoku - Killer Sudoku Puzzle

Killer Sudoku that teaches you Killer Sudoku. 25,000 puzzles, five difficulties, a daily challenge and a scored Hell run. No ads, no account, plays offline.

Killer Sudoku is Sudoku plus one idea: every dotted cage tells you what its digits add up to. That single clue turns guesswork into pure deduction — and Kudoku is built to make it click.

NEW TO KILLER SUDOKU? An interactive tutorial teaches the rules on a real board. Fill every row, column and 3×3 box with 1–9, make each cage hit its target sum, and never repeat a digit inside a cage. A couple of minutes and you are solving.

25,000 PUZZLES, FIVE TRACKS Easy, Medium, Hard, Expert and Master — 5,000 validated boards each, graded by the reasoning a board actually needs, so difficulty climbs instead of jumping. Every level is a fresh board, and every track is free to play in order.

A DAILY CHALLENGE WORTH KEEPING One new puzzle a day, a streak to protect and a badge for every month you complete. Missed dates stay in the calendar.

HELL MODE — FREE FOR EVERYONE One run. Five lives for the whole descent, not five per floor. A correct digit scores, a longer combo multiplies what it scores, and clearing a floor without a single slip doubles the bonus. A wrong digit costs a life and your combo — never points. Nineteen designed floors, and then it keeps going deeper. Premium buys no advantage here: no hints, no Auto Notes, the same rules for everyone. How deep you get earns a rank you keep and a poster you can share.

BUILT FOR THINKING • Cage-aware pencil notes and hints that reveal the next logical digit • A consistency wall that fills in on every day you play • Best times, solve counts and personal trends • Plays offline, saves every game, no account required • No ads, ever

KUDOKU PREMIUM (OPTIONAL) Unlimited hints (free play includes 3 per day), one-tap Auto Notes, matching-note highlight, last-cell hints, your full pace history, all 25,000 levels unlocked instantly with unlimited mistakes, extra board themes and iCloud sync across your devices.

Premium is a monthly or yearly auto-renewing subscription, or a one-time Lifetime purchase. Eligible new subscribers can try monthly Premium free for 3 days or yearly Premium free for 7 days. Prices are shown in the app before purchase and vary by region. Subscriptions renew automatically unless auto-renew is turned off at least 24 hours before the current period ends, and your Apple Account is charged within 24 hours before renewal. Manage or cancel anytime in Apple Account settings. Restore purchases from the paywall.

One cage at a time. Download Kudoku.

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