# Dudoku: Sudoku Brain Training — Hex Sudoku, Logic & Focus

> Hex Sudoku, Logic & Focus (iPhone/iPad app by Konstanty Koszewski.)

- Source: https://appshunter.io/ios/app/dudoku-sudoku-brain-training/id6758238799 (this page in markdown: same URL + `.md`)
- Developer: [Konstanty Koszewski](https://appshunter.io/developer/1871696981)
- Category: Games, Entertainment, Board, Puzzle
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 16.6 · 18 MB
- Languages: Arabic, Danish, Dutch, English, Finnish, French, German, Hebrew, Italian, Japanese and 10 more
- Released: 2026-02-09
- Data updated: 2026-09-04
- User reviews in markdown: https://appshunter.io/ios/app/dudoku-sudoku-brain-training/id6758238799/reviews.md

## What is Dudoku?

Train focus with calm, minimalist Sudoku — now with a massive 16×16 HEX, Literals mode, daily challenges and a rich rewards system.


Master your focus. Elevate your mind.

Dudoku is a clean, distraction-free puzzle app for thinkers who want challenge and calm.


WHY DUDOKU?

• Classic Sudoku (9×9) — perfect for daily practice and quick sessions.

• HEX Challenge (16×16) — a deeper test of spatial logic for advanced players.

• Literals Mode — swap numbers for letters for a fresh mental twist.

• Smart tools — intelligent notes, auto-check, highlights that supports play without distractions.


REWARDS, CHALLENGES & PROGRESSION

• Daily Challenge — a unique puzzle every day and grow your streak.

• Streaks & Leaderboards — track your consistency

• Collectible Badges — unlock beautifully designed badges for milestones, streaks, difficulty achievements and special events.

• Milestone System — move from “First Step” bronze to the prestigious “Grand Master” gold trophy as you improve.



PLAY MODES & DIFFICULTY

• Playground Mode — solve freely with unlimited mistakes. Experiment, learn patterns and relax without pressure.

• Challenge Mode — only 3 mistakes allowed. A focused test of accuracy, discipline and logic.



DIFFICULTY LEVELS IN EVERY MODE

Each puzzle mode offers three difficulty levels:

• Beginner — perfect for learning and casual play.

• Experienced — balanced challenge for regular players.

• Expert — dense logic, minimal clues, maximum focus.


FULLY CUSTOMIZABLE EXPERIENCE

Play the way you prefer:

• Enable or disable the timer.

• Toggle number/letter highlights on the board.

• Turn animations on or off.

• Create a clean, paper-like experience with minimal visual aids — or keep smart assistance enabled.


PREMIUM TRIAL & FEATURES

Start 3-day Premium trial for uninterrupted focus:

• Ad-free experience

• Unlimited puzzles across all modes

• Full access to advanced features and smart tools



PERFECT FOR EVERY SESSION

Quick brain boosts on the commute, focused practice during breaks, or deep sessions when you want to push your limits.



Download Dudoku — sharpen your logic, collect badges, build a streak, and enjoy a quieter, smarter puzzle experience.Train focus with calm, minimalist Sudoku — now with a massive 16×16 HEX, Literals mode, daily challenges and a rich rewards system. Start a 3-day Premium trial.


Privacy Policy: https://greenbisonstudio.web.app/privacy 
Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Dudoku Monthly Premium | $3.99 | per month |
| Dudoku Yearly Premium | $19.99 | per year |



## Version history (last 5 releases)

### 1.0.4 — 2026-02-18

- Stability improvements and optimized performance for a smoother experience.

- New Icon

### 1.0.4 — 2026-02-18

- Stability improvements and optimized performance for a smoother experience.

- New Icon

### 1.0.3 — 2026-02-13

Minor bug fixes and performance improvements. We've optimized the startup experience and refined regional settings for a smoother gameplay.

### 1.0.2 — 2026-02-11

- Added support for Traditional Chinese, Hebrew, Vietnamese, and Finnish

- New Splash Screen

- Minor bug fixes and performance updates

### 1.0.1 — 2026-02-09

No release notes.

## Apps similar to Dudoku

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Premium Sudoku](https://appshunter.io/ios/app/premium-sudoku/id6768044550) | — | Free | Games |
| [Sudoku ∞ – Neverending Sudoku](https://appshunter.io/ios/app/sudoku-neverending-sudoku/id6755081022) | — | Free | Games |
| [Neon Grid Sudoku](https://appshunter.io/ios/app/neon-grid-sudoku/id6744125178) | — | Free | Games |
| [Sudoku OTG \| Fast Logic Puzzle](https://appshunter.io/ios/app/sudoku-otg-fast-logic-puzzle/id6751738572) | 5.0 (1) | Free | Games |
| [Sudoku BB](https://appshunter.io/ios/app/sudoku-bb/id6762312116) | 5.0 (2) | Free | Games |
| [Sudoku Waterfall](https://appshunter.io/ios/app/sudoku-waterfall/id6758223179) | 5.0 (1) | Free | Games |

## More apps by Konstanty Koszewski

- [Dual N-Back: Memory Trainer](https://appshunter.io/ios/app/dual-n-back-memory-trainer/id6759211886)

All apps by Konstanty Koszewski: https://appshunter.io/developer/1871696981

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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 2026-09-04.*