# Four Colors Challenge

> Four Colors Challenge (iPhone/iPad app by 成阳 杨.)

- Source: https://appshunter.io/ios/app/four-colors-challenge/id1098521737 (this page in markdown: same URL + `.md`)
- Developer: [成阳 杨](https://appshunter.io/developer/1098521736)
- Category: Games, Entertainment, Puzzle
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 11.0 · 18 MB
- Languages: American English, Japanese, Chinese (Simplified, China)
- Released: 2016-04-30
- Data updated: 2026-05-19
- User reviews in markdown: https://appshunter.io/ios/app/four-colors-challenge/id1098521737/reviews.md

## What is Four Colors Challenge?

Four Colors Suffice,a fantastic anti-Elimination puzzle game.

The four color theorem,one of the world's three mathematical conjectures,  states that, given any separation of a plane into contiguous regions, producing a figure called a map, no more than four colors are required to color the regions of the map so that two adjacent regions WOULD NOT BE THE SAME. Two regions are adjacent if they share a common boundary that is not a corner, in which corners are the points shared by three or more regions.It was proven in 1976 by Kenneth Appel and Wolfgang Haken and by computer as the first major theorem.Now, it's time to prove this theorem yourself! Let your logical thinking to get an incredible workout!

·Simply move down and up left and right, to obtain your own solution!
·Billions solutions waiting to be found, and will be named by you!
·Suitable for all ages, perfect for those who want to exercise logical thinking.
·Continuously updated, with one-time purchase.

Please connect to Internet for saving data.

This is an independent game, independent development effort is limited,if there's any BUG,or if you have any advice or suggestion or idea,please send email to ycy1164656@gmail.com,I will all reply.
Sina Weibo:http://weibo.com/1923527027

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| 0.99$ = 100swap | $0.99 | one-time |



## Version history (last 4 releases)

### 1.0.3 — 2020-02-24

加入音效，新增关卡，免费

### 1.0.2 — 2016-05-26

Bug Fix

### 1.0.1 — 2016-05-01

1.Fix crash bugs
2.Add replay kit

### 1.0 — 2016-04-30

No release notes.

## More apps by 成阳 杨

- [掌心校园](https://appshunter.io/ios/app/id1289130460)
- [千池](https://appshunter.io/ios/app/id6450661830)

All apps by 成阳 杨: https://appshunter.io/developer/1098521736

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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 2026-05-19.*