# 6x6 & 7x7 & 8x8 SUDOKU from Easy to Difficult — Strange SUDOKUs never seen!

> Strange SUDOKUs never seen! (iPhone/iPad app by Kozo Terai.)

- Source: https://appshunter.io/ios/app/6x6-and-7x7-and-8x8-sudoku-from-easy-to-difficult/id1239025050 (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 · 13 MB
- Languages: American English, Japanese, Chinese (Simplified, China), Chinese (Traditional, Taiwan)
- Released: 2017-05-22
- Data updated: 2026-05-15
- User reviews in markdown: https://appshunter.io/ios/app/6x6-and-7x7-and-8x8-sudoku-from-easy-to-difficult/id1239025050/reviews.md

## What is 6x6 & 7x7 & 8x8 SUDOKU from Easy to Difficult?

6x6 & 7x7 & 8x8 SUDOKU from Easy to Difficult
Do you want to try Sudoku (Number Place) for the first time, or 9x9 Sudoku(Number Place)  seems a little difficult, or do you want to make your kid smart, develop their thinking ability, or do you just want to play an easy puzzle without thinking so much, or are you bored with 9x9 Sudoku?
This is the app!

This SUDOKU is a little eccentric modified version.
Put the digits in each color, too,
as well as vertical columns and horizontal rows.

There are 100 levels in the puzzle, so start with the one you can do easily.
Level 1 is very easy, but it gets harder as the level goes up.
High level problems are quite difficult. 

Since Sudoku puzzles are generated automatically, you can play with infinite number of Sudoku puzzles at each level!

The puzzle is auto-saved, so you can continue playing from the place you quitted.

If you are confused, use the memo mode! Multiple numbers can be written on the same square.

You can also highlight particular numbers to make it easier to think.

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

Step into the world of numerical puzzles!

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

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



## Version history (last 5 releases)

### 1.3 — 2017-06-20

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

Added 8x8 SUDOKU.
New app, 12x12 SUDOKU coming soon!

### 1.2 — 2017-06-06

Added 7x7 SUDOKU.
8x8 coming soon.

### 1.1.1 — 2017-06-02

Made a little change.
7x7 Sudoku coming soon.

### 1.1 — 2017-05-23

Changed some colors.
7x7 Sudoku coming soon.

### 1.0 — 2017-05-22

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

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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 2026-05-15.*