Suduxo: Learn Sudoku

Play Classic Sudoku free on three levels. Learn techniques in the Academy and find the logic behind your next move. More content and no ads with a one-time Plus purchase.

Sudoku at your pace, with help to understand your next move. Play Classic Sudoku free on Easy, Medium and Hard, and learn techniques in Suduxo Academy.

When you get stuck, Pattern Coach helps you find a technique and a place to focus. A new technique hint costs one life in the free version; Suduxo Plus includes guidance without spending lives.

The shared daily puzzle brings a fresh challenge every day. Plus is a one-time purchase that unlocks six special variants, Expert and Extreme, unlimited lives and an ad-free app. The free version uses lives and shows ads between some games. Your local price is shown before purchase.

With Plus, explore Killer, Thermometer, Diagonal, Windoku, Arrow and Suduxo's original Echo variant. Every Extreme puzzle has exactly one solution and has been verified as logically solvable without guessing.

Choose manual notes, smart clearing or automatic candidates. Undo and redo are always free, and you can reset the same puzzle without losing the option to undo the reset. Every completed board receives a score based on difficulty, variant, time, precision and how independently it was solved. Fastest time and best score are stored separately.

Suduxo Academy teaches techniques ranging from naked and hidden singles to naked pairs, X-Wing and advanced patterns. The Logic Lab adds short rounds of mental arithmetic and number sequences.

Features:

• Classic Sudoku with three free difficulty levels
• Six special variants, Expert and logic-certified Extreme with Suduxo Plus
• Technique-based Pattern Coach hints for one life
• Pattern Coach guidance without life cost with Suduxo Plus
• Free undo, redo and undoable puzzle reset
• Manual notes, smart clearing and automatic candidates
• Best scores, fastest times, daily marks and achievements
• Apple Game Center leaderboards and achievements
• One new life every 30 minutes
• A shared numbered daily puzzle with a result card
• Lessons for basic and advanced techniques
• Sum Hunt and Pattern Pulse mini-games
• Daily goals, streaks, marks and personal progress
• Light and dark appearance
• Swedish and English
• Optional rewarded ads
• Permanent Suduxo Plus purchase; local App Store price shown before purchase

Suduxo works without an account. Starting, undoing, redoing or resetting a puzzle never costs a life. A mistake or a new technique hint costs one life, and automatic candidates cost at most one life per puzzle. Mistakes also reduce the score. One life returns every 30 minutes. The first app session and first five completed Sudoku puzzles have no full-screen ads. After a one-time explanation, an ad may appear after Sudoku 6 and then every third completed Sudoku, only between games and subject to time and daily limits. Logic Lab is counted separately and less often. There are no banners, launch ads or ads during a game, and a completed optional rewarded ad skips the next scheduled full-screen ad. Suduxo Plus permanently unlocks all premium content, guidance and automatic candidates without life cost, focus audio and unlimited lives, and removes all advertising. There are no purchasable currencies, consumable packs or loot boxes.