# doku.su: Sudoku Coach — Hints that explain every move

> Hints that explain every move (iPhone/iPad app by Julien Bouisset.)

- Source: https://appshunter.io/ios/app/dokusu-sudoku-coach/id6790965226 (this page in markdown: same URL + `.md`)
- Developer: [Julien Bouisset](https://appshunter.io/developer/6790965228)
- Category: Education, Games, Puzzle
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 15.0 · 40 MB
- Languages: American English, French (France)
- Released: 2026-07-22
- Data updated: 2026-10-12

## What is doku.su?

Learn Sudoku by understanding each move.

Sudoku Coach is a calm place to learn the rules, practice solving methods, and work through real puzzles without guessing. Every hint begins with valid Sudoku logic and reveals only as much as you ask for.

START AS A COMPLETE BEGINNER
• Learn what a row, column, and 3 × 3 box mean.
• See one ordinary-language explanation before the official technique name.
• Follow short worked examples, then try the same idea yourself.

SOLVE WITH A COACH
• Ask for a clue from your current grid.
• Reveal the reasoning one step at a time.
• Discuss your reasoning without letting generated text invent puzzle facts.
• Keep solving offline; coached replies and sync return when you reconnect.

BUILD LASTING SKILL
• Practice scanning, single-candidate moves, hidden placements, candidate notes, pairs, and advanced patterns.
• Review mistakes from the exact position where they happened.
• Track learning evidence, not just puzzle completion.
• Continue on another device with an optional account.

FREE INCLUDES
• A daily puzzle
• Beginner lessons
• Unlimited coaching for your first three puzzles
• Basic progress tracking

COACHING SUBSCRIPTION
Coaching unlocks unlimited coached puzzles, the full lesson library, unlimited hints and undos, personalized practice, spaced mistake review, and full progress history.

The monthly price is shown before purchase and may vary by region. Payment is charged to your App Store account. The subscription renews automatically unless cancelled in App Store settings at least 24 hours before the end of the current period. You can restore purchases and manage the subscription from Account inside the app.

Privacy: https://doku.su/privacy
Terms: https://doku.su/terms
Support: https://doku.su/support

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Coaching | $5.99 | per month |


## Is doku.su safe?

Not enough ratings yet to assess doku.su.

## Is doku.su legit?

doku.su: Sudoku Coach has limited verification signals. The AppsHunter Legitimacy Score for doku.su is 58 out of 100 points across 7 verification signals from App Store and developer data.


## Version history (last 5 releases)

### 2.5 — 2026-10-10

Guided lessons now share a clearer layout and answer panel. You can try more answers and learn from mistakes. Coaching, settings and account controls are easier to use, with smoother expandable sections and clearer feedback.

### 2.4 — 2026-09-29

Lessons make each step of the reasoning easier to follow. Your place is saved more reliably when you leave and return. Coaching lessons open more reliably. The Puzzles and Lessons pages are easier to read.

### 2.3 — 2026-09-16

Learning now feels clearer throughout the app. Home shows your next step beside a preview of the actual puzzle, lessons are easier to scan, and practice and coaching use calmer visual guidance.

### 2.2 — 2026-08-27

Play with fewer interruptions: routine sync status no longer covers the grid. When you share a result, you can now choose whether to include your solving time, and Sudoku Coach remembers your preference.

### 2.1 — 2026-08-22

Guidance now lets you focus on solving or candidate notes, scan a promising row, column, or block, and work through each deduction step by step. Photo imports better separate printed clues, handwriting, and notes, with clearer recovery when your progress establishes the puzzle.

## Apps similar to doku.su

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Sudoku Coach: Trainer](https://appshunter.io/ios/app/sudoku-coach-trainer/id6758725909) | 4.3 (4) | Free | Education |
| [Quick Math: Speed Brain Game](https://appshunter.io/ios/app/quick-math-speed-brain-game/id6759104351) | 5.0 (2) | Free | Education |
| [Vineyard Columbus Church](https://appshunter.io/ios/app/vineyard-columbus-church/id1542110647) | 5.0 (8) | Free | Education |
| [Phidoku: Snap & Learn Sudoku](https://appshunter.io/ios/app/phidoku-snap-and-learn-sudoku/id6743101030) | — | Free | Education |
| [Hendrix Today](https://appshunter.io/ios/app/hendrix-today/id6455126560) | 5.0 (4) | Free | Education |
| [Mount St. Mary Academy LR](https://appshunter.io/ios/app/mount-st-mary-academy-lr/id6447438945) | 5.0 (2) | Free | Education |

## More apps by Julien Bouisset

- [Concession: Mine & Prosper](https://appshunter.io/ios/app/concession-mine-and-prosper/id6815232306)

All apps by Julien Bouisset: https://appshunter.io/developer/6790965228

## Related topics

[sudoku coach](https://appshunter.io/ios/topics/sudoku-coach)

---

*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 2026-10-12.*