# Takuzu: Binary Logic Puzzle — Binary logic, honestly graded

> Binary logic, honestly graded (iPhone/iPad app by Zakaria Fatahi.)

- Source: https://appshunter.io/ios/app/takuzu-binary-logic-puzzle/id6805455597 (this page in markdown: same URL + `.md`)
- Developer: [Zakaria Fatahi](https://appshunter.io/developer/1885443612)
- Category: Games, Board, Puzzle
- Price: Free
- Age rating: 4+
- Requires: iOS 15.0 · 25 MB
- Languages: American English
- Released: 2026-09-16
- Data updated: 2026-09-22
- User reviews in markdown: https://appshunter.io/ios/app/takuzu-binary-logic-puzzle/id6805455597/reviews.md

## What is Takuzu?

Binary logic, graded by the technique each board actually needs.

Fill a grid with two symbols under three rules: never three of the same symbol in a row, an equal count of each per line, and no two identical rows or columns. Tap a cell to cycle it. That is the whole game.

DIFFICULTY THAT MEANS SOMETHING
Boards are labelled by the DEEPEST solving technique they genuinely require — Dawn, Day, Dusk and Night — computed by the same deterministic solver that proves each board has exactly one solution. Dawn, Day and Dusk are solvable by pure forward deduction: no hypotheticals, no guessing. Night asks for exactly one bounded "what-if" chain that resolves in a few steps, never open-ended trial and error. We say that precisely rather than promising a "never guess" that a hard board would contradict.

WHY YOU'LL STAY
• One puzzle a day, byte-identical worldwide, with no server
• Streaks, and a fully reconstructible free archive
• Several sizes, from a quick grid to a long sit-down
• Hints reveal the next forced cell, never the answer

MADE TO BE COMFORTABLE
• The two symbols always differ in SHAPE, not just colour, at every cell size
• A colorblind-safe palette and a fully accessible input path
• Play in English, German, Arabic, Persian or Kurdish (Sorani)
• Proper right-to-left layout and localized numerals
• Fully offline. No account, no sign-up

FREE, HONESTLY
The daily, the archive, streaks and stats are free with light optional ads. Rewarded video is opt-in and only ever buys a hint. No banner ads on the board, ever. One purchase removes all ads and lifts the hint cap — no subscription.


## Version history (last 1 release)

### 1.0 — 2026-09-16

No release notes.

## More apps by Zakaria Fatahi

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- [خودرو یار](https://appshunter.io/ios/app/id6775301956)
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- [SplitFair: Who Owes What](https://appshunter.io/ios/app/splitfair-who-owes-what/id6789096835)
- [Number Forge: Daily Math](https://appshunter.io/ios/app/number-forge-daily-math/id6794768074)

All apps by Zakaria Fatahi: https://appshunter.io/developer/1885443612

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-09-22.*