Sudoku Logic Refined

By: 天信王

Hints that teach you to solve

Features & Capabilities

Every hint explains the technique — what it is, why it works, how to spot it next time. 80+ techniques, a daily challenge, and a calm, ad-free board.

Most sudoku apps just hand you the answer. This one teaches you to find it yourself.

WHY IT'S DIFFERENT

Hints that teach Open a hint and you don't just get the next number — you get the technique behind it: what it is, why it works, and how to spot it next time. Reveal it step by step, so you decide how much help you want.

80+ techniques, explained From your first Naked Single to X-Wing, Swordfish, Y-Wing, Skyscraper, and AIC/ALS chains — every technique comes with a clear card: what it is, why it works, how to find it, and a worked example you can replay.

A daily challenge One hand-picked puzzle a day — the same for everyone, everywhere.

Curated, uniquely-graded puzzles Five difficulties from Easy to Master. Every puzzle is validated for a single solution and graded by the hardest technique it needs — pure logic, never guessing.

Step-by-step replay Watch any puzzle solved one logical step at a time, and see exactly where each technique applies.

Calm and focused A clean, distraction-free board. No banners, no pop-ups, no clutter — just you and the logic. Play fully offline.

MADE FOR PEOPLE WHO WANT TO IMPROVE • Learn solving techniques the right way • Crack hard puzzles with logic alone • A board that gets out of your way

SUDOKU PRO Try everything free for 3 days, then keep unlimited hints, the full technique library, step-by-step replay, and the daily challenge. • Monthly — $4.99 (3-day free trial) • Yearly — $24.99 (3-day free trial · save 58%) • A one-time unlock is also available.

Payment is charged to your Apple Account at confirmation of purchase. Subscriptions renew automatically unless canceled at least 24 hours before the end of the current period; your Apple Account is charged for renewal within 24 hours before the period ends. Manage or cancel anytime in your Apple Account settings. Any unused portion of a free trial is forfeited when you purchase a subscription.