# Easy Sudoku 4x4 to 7x7 for Color Figures — Train your head!

> Train your head! (iPhone/iPad app by Kozo Terai.)

- Source: https://appshunter.io/ios/app/easy-sudoku-4x4-to-7x7-for-color-figures/id1255395732 (this page in markdown: same URL + `.md`)
- Developer: [Kozo Terai](https://appshunter.io/developer/817321452)
- Category: Games, Education, Puzzle
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 7.1 · 15 MB
- Languages: American English, Japanese, Chinese (Simplified, China), Chinese (Traditional, Taiwan)
- Released: 2017-07-12
- Data updated: 2026-06-01
- User reviews in markdown: https://appshunter.io/ios/app/easy-sudoku-4x4-to-7x7-for-color-figures/id1255395732/reviews.md

## What is Easy Sudoku 4x4 to 7x7 for Color Figures?

Shin-chan's Easy SUDOKU 4x4,6x6,7x7
Do you want to strengthen your kid's thinking ability?
Why don't you train your kids' head by doing puzzles with some Shin-chan and  friends' pictures?
That is the origin of the development of this application.
I hope children would have fun playing with SUDOKU, train the brain, and acquire thinking skills.
It also becomes a brain train of elderly people.

There are 100 levels in each puzzle, so start with the one you can do easily.
Since Sudoku puzzles are generated automatically, you can play with infinite number of Sudoku puzzles!

You can also play 4x4,6x6,7x7,8x8 ordinary number sudoku.

Sudoku Rules
Put all four 1,2,3,4 (or1,2,3,4,5,6,7) numbers in 4(or 6,7) vertical columns, 4(or 6,7) horizontal rows, 4(or 6,7) squares surrounded by bold lines.

Step into the world of numerical puzzles!

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| No Ads for Crayon Sudoku | $0.99 | one-time |



## Version history (last 3 releases)

### 1.0.2 — 2017-07-21

This app has been updated by Apple to display the Apple Watch app icon.

Changed the location of some buttons.

### 1.0.1 — 2017-07-18

Added 7x7 mode.

### 1.0 — 2017-07-12

No release notes.

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## More apps by Kozo Terai

- [Learn Sushi](https://appshunter.io/ios/app/learn-sushi/id817321449)
- [Irresponsible Vending Machine](https://appshunter.io/ios/app/irresponsible-vending-machine/id836950720)
- [Utaitan's Learn Numbers And Calculations](https://appshunter.io/ios/app/utaitans-learn-numbers-and-calculations/id850593630)
- [Test for Yo-kai Watch](https://appshunter.io/ios/app/test-for-yo-kai-watch/id896306332)
- [Test for USJ](https://appshunter.io/ios/app/test-for-usj/id901090888)
- [Medal Sound Collection for Yo-kai Watch](https://appshunter.io/ios/app/medal-sound-collection-for-yo-kai-watch/id904191049)

All apps by Kozo Terai: https://appshunter.io/developer/817321452

## Related topics

[easy sudoku 4x4 to 7x7 for color figures](https://appshunter.io/ios/topics/easy-sudoku-4x4-to-7x7-for-color-figures)

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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 2026-06-01.*