Pure logic · Zero ads
A calm, beautifully made Sudoku for people who enjoy the logic itself. A hint coach that teaches, tens of thousands of rated puzzles, and a board that stays out of your way.
Hint coach
Ask for a hint and the coach walks you through the idea in three short steps: where to look, why it works, and what it lets you place.
Collections
Every puzzle shows its Sudoku Explainer rating. The first chapter of each collection is free.
Daily challenge
A new puzzle every day with a calendar, a streak and an archive. Offline too.
Mastery stats
Pure wins, solving pace, best times and a 14-day activity chart.
Private by design
Built for focus
Seven palettes, each in light and dark, with a soft crosshair and a liquid-glow cursor. Tap a colour and this page follows too.
Blue
$0
$2.99/month
or $14.99/year with a 7-day free trial · or $24.99 once, forever
from $2.99
Payment is charged to your Apple Account. Subscriptions renew automatically unless cancelled at least 24 hours before the period ends. Manage in Account Settings.
Yes. No ads, no accounts and no tracking. You can play the first chapter of every collection for free, and Pro is optional.
Completely. All puzzles are bundled with the app, including the daily challenge, so it works on a plane or a train.
On your device. Your games, statistics and settings are never uploaded, because we don’t run servers that receive them.
Open Settings and tap Restore Purchases. Use the same Apple Account you bought with.
From well-known public collections. We rated each puzzle by difficulty and sorted them into sets so you can climb from gentle warmups to brutal extremes.
iPhone, in light and dark mode. iPad runs the iPhone layout.
Coming soon to the App Store for iPhone. Questions or feedback in the meantime? We’d love to hear from you.
