Kyu Sudoku

A calm, paper-textured sudoku for iPhone. Solve the day's puzzle, climb a quiet ladder of rank, and keep your data to yourself.

DAILY CHALLENGE One board a day, shared by every player and reset at midnight. Solve it against the clock, keep your streak alive, and see where you land on the public leaderboard, ranked by solve time. The top three wear a mark beside their name. There are no hints in the Daily Challenge, so the race stays fair for everyone.

OR JUST PLAY Four difficulties from Easy to Expert, at your own pace. You can hide the clock if it makes you rush. Three mistakes ends a game, but you can take one second chance and the run still counts toward your best time, stats and badges.

HINTS ON YOUR TERMS Every puzzle comes with two free hints, and you can turn that down to one or zero in Settings. Need more? Earn up to three bonus hints per puzzle with a short ad, or unlock them all with Kyu Supporter.

A LADDER OF RANK Kyū is borrowed from the dojo, not the app store. Rise through five flower ranks as you solve, from Plum at 25 puzzles to Peony at 1,000.

27 BADGES ACROSS NINE PATHS Beyond the ranks, earn badges for daily streaks, leaderboard finishes, Hard and Expert mastery, completed Daily Challenges, mistake-free runs, hint-free solves, clean sweeps of all four difficulties in one day, and all-time leaderboard placings.

KYU SUPPORTER A one-time purchase: all three bonus hints on every puzzle, free second chances, no ads, and a small mark on your profile. It buys convenience, never a win. The Daily Challenge stays free of hints and second chances for everyone.

YOUR DATA STAYS YOURS • No account, no email, no sign-up. Just a random ID made on your device. • The only things that leave your phone are your leaderboard entries and a private backup of your progress, so a reinstall picks up where you left off. • Ads are opt-in rewarded ads only, and non-personalized. No banners, no pop-ups. • No analytics, no crash reporting, nothing watching how you play.

Made by an independent developer.