Sudoku - Daily Brain Training

Calm classic Sudoku: no ads during play, fully offline. Easy to Expert, Daily Challenge, notes, hints. Minimal board, auto-save. Train your mind any time with pure logic.

Looking for a classic Sudoku you can actually settle into? This app is built for calm, focused logic—without interruptions.

Play on your commute or unwind in a quiet moment. There is a challenge waiting at every level.

FEATURES • Four difficulties: Easy, Medium, Hard, and Expert • Daily Challenge: a new puzzle each day, with a completion streak • Smart tools: auto error check, highlight matching numbers, notes, auto-fill candidates, undo, erase, and a timer • Quick tutorial: learn rows, columns, and boxes in about 30 seconds • Calm visuals: a minimal board with light and dark themes; follow system appearance; completed digits fade on the keypad • Play offline: puzzles are stored on device; no ads during play • Auto-save and resume anytime; stats for games completed, best time, average time, and streaks • iPhone and iPad

FREE TO PLAY Classic Sudoku, Daily Challenge, notes, timer, and stats are free. Free users get 3 hints per day (as shown in the app).

MEMBERSHIP (In-App Purchase) • Unlimited hints whenever you get stuck • Premium board themes, including mint green, pure black, paper, vibrant orange, and glacier blue • Member benefits continue to expand (see Membership in the app)

Plans (pricing and any free trial are shown in the app and on the App Store): • Monthly membership: auto-renewable subscription • Yearly membership: auto-renewable subscription (a free trial may be offered) • Lifetime membership: one-time purchase, not a subscription

Subscription terms: • Payment is charged to your Apple ID account at confirmation of purchase • Subscriptions automatically renew unless auto-renew is turned off at least 24 hours before the end of the current period • Your account will be charged for renewal within 24 hours prior to the end of the current period • Manage or cancel in Settings → Apple ID → Subscriptions • Any unused portion of a free trial may be forfeited when you purchase a subscription • For refunds and billing, contact Apple Support

HOW TO PLAY Fill the 9×9 grid with digits 1–9 so each row, column, and 3×3 box contains every digit once. Given clues cannot be changed. Every standard puzzle has one solution.

Download and start your daily logic practice.

LEGAL • Privacy Policy: https://iorangepie.com/common/ios/shudu/privacy-policy-en.html • Terms of Service: https://iorangepie.com/common/ios/shudu/terms-of-service-en.html • Terms of Use (Apple Standard EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

By using this app, you agree to the above terms.