# One Brain — Does the color match the text?

> Cognitive challenge game testing reaction to conflicting visual information. (iPhone/iPad app by Erik Wegener.)

- Source: https://appshunter.io/ios/app/one-brain/id1229367064 (this page in markdown: same URL + `.md`)
- Developer: [Erik Wegener](https://appshunter.io/developer/424482392)
- Category: Games, Education, Trivia, Word
- Price: Free with in-app purchases
- Rating: 4.40/5 from 296 App Store ratings · 226 written reviews indexed
- Age rating: 4+
- Requires: iOS 15 · 10 MB
- Languages: American English, German (Germany)
- Released: 2017-04-24
- Data updated: 2026-09-04
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/one-brain/id1229367064/reviews.md

## What is One Brain?

One Brain is inspired by the Stroop effect, a famous psychological test that measures how well you handle conflicting information. For example, it's harder to name the color of a word when the word itself spells a different color. This game challenges your whole brain as you fight to process the mixed signals and make the right call before time runs out.

Game modes:
• Colors: Does the word match the color it's written in?
• Arrows: Is the arrow actually pointing the way it says it is?
• Numbers: Is the math equation true or false?
• Words: Which word matches the definition?

How high can you score under pressure?

## Key features

- Stroop effect inspired gameplay
- Color matching challenges
- Arrow direction tests
- Math equation verification
- Timed gameplay
- Score tracking

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Remove Ads | $0.99 | one-time |


## What do users think of One Brain?

Overall sentiment: neutral

**Pros**

- 👍 Simple and effective brain training
- 🧠 Helps improve focus and concentration
- 🤯 Challenging and addictive gameplay

**Cons**

- ⏱️ Timer is too short, needs more time
- 🙄 Excessive ads and interruptions
- 🤖 Inconsistent scoring and feedback

**Commonly reported bugs**

- Incorrect registering of correct answers
- Crashes and freezes on certain devices
- Keyboard controls not working as expected

**Most requested features**

- Adjustable difficulty levels
- More game modes and variations
- Option to disable ads or pay for ad-free version

## Recent user reviews (10 of 226)

All indexed reviews: https://appshunter.io/ios/app/one-brain/id1229367064/reviews.md

### 5/5 — My opinion

*2026-06-02*

Its the best game ever kinda hard though

### 1/5 — meh

*2026-05-25, version 2.9.8*

meh

### 1/5 — Disappointing

*2026-01-04*

Click on the correct/ck mark and it doesn’t register and counts it wrong.  Removing the game.  I want a game that you can actually play and be challenged correctly!

**Developer response:** We checked the code carefully and could not detect any bug in the game.

### 5/5 — Sooo fun

*2025-08-28, version 2.9.8*

It's really good

### 5/5 — Redownloaded

*2025-07-30, version 2.9.8*

The app does what it needs to do

### 4/5 — Gut

*2025-07-22*

Nach wie vor top: Einfach gehalten und aufs Notwendigste beschränkt, ohne den ganze  Schnickschnack. Fünf Sterne für eine regelbare Lautstärke, derzeit gibt es nur an oder aus.

### 1/5 — Ruined

*2025-06-16, version 2.8.1*

Would have recommended the game before the game was updated to not be able to use the arrows on the keyboard. If this is a bug please fix and id be glad to redownload

### 3/5 — Problems

*2025-06-06, version 2.9.2*

I like the game, but there is a problem when I choose to play color game and for example the text is gray when I click X it says game over.

### 3/5 — Color Match

*2024-10-16, version 2.8.1*

I didn't see a tutorial.

### 4/5 — Awesome

*2024-10-04*

Such a good game, really gets me thinking. There is just one probelm. With the new update, I can't use my arrow keys on Mac. It works using the cursor, but I'm not sure what happened because this only started to happen after I did the last update. Other than this, it's so awesome, I have it on my phone and laptop so I can play it anywhere. I love it!

## Frequently asked questions about One Brain

### What is the One Brain app?

One Brain is a mobile game inspired by the Stroop effect, a psychological test. It challenges your brain to process conflicting visual information, such as identifying the color of a word when the word itself spells a different color, or verifying math equations.

### What are the game modes available?

The app features three distinct game modes: 'Colors,' where you determine if the word's text color matches the word itself; 'Arrows,' testing if an arrow points in the direction it states; and 'Numbers,' requiring you to verify if a math equation is true or false.

### Is One Brain free to play?

Yes, the app is free to download and play. It does include advertisements and offers in-app purchases, which may provide benefits or remove ads.

### What is the main goal of the game?

The primary goal is to score as high as possible by correctly answering the challenges presented in each game mode before time runs out. It's designed to test your cognitive speed and accuracy under pressure.

### Who is this app designed for?

This app is designed for anyone interested in testing their cognitive abilities, improving reaction time, and engaging in a fun, challenging brain training exercise. It's particularly appealing to those interested in psychology and cognitive science.

## Version history (last 5 releases)

### 2.10 — 2026-08-08

• Added a new game mode: English words!

### 2.9.7 — 2025-07-05

• Improved support for Game Center

### 2.9.6 — 2025-07-03

• Fixed a bug
• Added support for Game Center (only fast mode is ranked)

### 2.9.5 — 2025-07-02

• Fixed a few bugs

### 2.9.4 — 2025-06-26

• Visual optimizations

## Apps similar to One Brain

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [IQ Boost: Training Brain Games](https://appshunter.io/ios/app/iq-boost-training-brain-games/id1518047412) | 4.5 (44,476) | Free | Games |
| [Brain Puzzle Games for Adults](https://appshunter.io/ios/app/brain-puzzle-games-for-adults/id887025430) | 4.3 (17,564) | Free | Games |
| [Brain Games - Left vs Right](https://appshunter.io/ios/app/brain-games-left-vs-right/id576395411) | 4.7 (24,699) | Free | Games |
| [Brain Test: Tricky Puzzles](https://appshunter.io/ios/app/brain-test-tricky-puzzles/id1486214495) | 4.8 (1,456,681) | Free | Games |
| [Easy Game - Brain Puzzles](https://appshunter.io/ios/app/easy-game-brain-puzzles/id1491764681) | 4.6 (203,615) | Free | Games |
| [Sudoku.com - Number Games](https://appshunter.io/ios/app/sudokucom-number-games/id1193508329) | 4.8 (1,847,599) | Free | Games |

## More apps by Erik Wegener

- [Key Cloud Password Manager](https://appshunter.io/ios/app/key-cloud-password-manager/id473515839)
- [Key Cloud Pro Password Manager](https://appshunter.io/ios/app/key-cloud-pro-password-manager/id506738006)
- [Math Rocket – Solve Equations](https://appshunter.io/ios/app/math-rocket-solve-equations/id1074373097)
- [Math Flash Brain Training](https://appshunter.io/ios/app/math-flash-brain-training/id1229460445)
- [Freaky Focus](https://appshunter.io/ios/app/freaky-focus/id1250123815)

All apps by Erik Wegener: https://appshunter.io/developer/424482392

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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.*