Free
Rating summary
About
Sudayku is your morning sudoku.
Every night at midnight, four fresh puzzles appear: easy, medium, hard and expert. Everyone plays exactly the same ones, so times are actually comparable. Solve one over coffee and the rest whenever you like.
DAILY LEADERBOARD
Your time counts towards that day's leaderboard. Mistakes and hints cost one minute each, so calm and clean often beats rushed. In the evening you hear where you finished. Past leaderboards stay around: browse back to Sudayku #1 and your own time is still there.
MATCHES WITH FRIENDS
Challenge a friend and play the same puzzle on a shared countdown. Not around? They play it later and you compare afterwards. Your statistics show your time next to theirs for every match.
YOUR PROGRESS
A daily streak, a chart of your solving times, and the Sudayku index: one number that follows how you're playing right now, weighted by difficulty.
NO ACCOUNT, NO FUSS
No email, no password, no ads, no trackers. Pick a name and play. Add friends with a code, a QR or straight from the leaderboard.
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What's New in Sudayku
1.7
September 13, 2026
Play on all your devices. Sign in with Apple, Google or email (Settings → Account): your name, times, badges and friends follow you to your iPad or your new phone. Everything you already had stays. Also new: • Badges for puzzles solved, daily winner per difficulty, and streaks of 25 and 100 days. • A Play now button in the leaderboard for today's puzzle you haven't played yet. • Pausing no longer counts against you: starting in the morning and finishing at night is fine.
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