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About
Most sudoku apps tell you whether you were right. Deducta tells you why — and whether you actually deduced it or simply got lucky. It is a sudoku trainer built for people who love logic puzzles for adults: classic 9x9 boards, smart hints when you are stuck, and a daily brain exercise that plays offline, wherever you are.
WHAT MAKES IT DIFFERENT
Every puzzle you finish ends with a solve report: which techniques you used, how much of the grid you cleared by pure logic, and exactly where you started guessing. Deducta learns which techniques you have mastered and which ones you quietly avoid, then builds boards around your weak spots.
No more grinding through random grids. Every puzzle has a reason to exist.
LEARN SUDOKU THE WAY IT IS REALLY SOLVED
- Naked and hidden singles, pairs and triples
- Pointing pairs and box-line reduction
- X-Wing, Swordfish and XY-Wing
- Unique rectangles and advanced chains
You learn them in context, on a real board, at the exact moment they apply. No wall of theory to memorise first. Whether you want to learn sudoku from the basics or sharpen the techniques behind expert solves, every board trains your logic a little further.
FIVE LEVELS, ONE PROMISE
Easy, Medium, Hard, Expert and Extreme. The hardest boards are as evil as sudoku gets, yet every board has exactly one solution and can always be finished by logic alone. You will never be forced to guess.
BUILT TO BE COMFORTABLE TO READ
A brain sudoku that works for seniors and for anyone who prefers a calm, clear screen:
- Large, high-contrast numbers
- Generous tap targets that forgive an unsteady hand
- A clean grid with nothing competing for your attention
- Light and dark themes
CLASSIC SUDOKU, DONE PROPERLY
- Smart notes and automatic candidate cleanup
- Undo, hints and error checking, all under your control
- A new daily puzzle to keep your streak alive
- Statistics that matter: solve times, accuracy and technique mastery over time
DAILY BRAIN GAMES FOR ADULTS, ANYWHERE
Sudoku offline means no connection needed: solve on a plane, on the train or with your morning coffee. A few minutes a day is all it takes to turn number puzzles into a real brain exercise you can measure.
Whether you are chasing your first Extreme board or you just want a calm, readable grid to start the day, Deducta meets you where you are.
Train your logic. Stop guessing. See the difference in your own numbers.
Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
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What's New in Sudoku Deducta
2.0.2
October 31, 2026
In this version we've improved how Sudoku Deducta is presented on the App Store: a clearer description of what the app offers, and the listing is now available in more languages. Thanks for playing. If you enjoy Sudoku Deducta, a rating helps us a lot.
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