# GreenRed — Train your brain with Stroop

> Cognitive training game based on the Stroop effect, testing color naming speed. (iPhone/iPad app by Hartti Suomela.)

- Source: https://appshunter.io/ios/app/greenred/id1517335347 (this page in markdown: same URL + `.md`)
- Developer: [Hartti Suomela](https://appshunter.io/developer/1517335346)
- Category: Games, Casual, Puzzle
- Price: Free
- Rating: 5.00/5 from 1 App Store ratings
- Age rating: 4+
- Requires: iOS 13.2 · 10 MB
- Languages: English
- Released: 2020-08-10
- Data updated: 2026-07-05
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/greenred/id1517335347/reviews.md

## What is GreenRed?

GreenRed is based on a cognitive phenomenon called Stroop effect. In layman’s terms this means that when people are asked to name shown colors, if linguistic and visual input are not aligned, naming the colors takes longer.
In GreenRed game you are shown colored words. Basically these are color names printed with different colors. Your task is to name the print color as fast as possible by tapping a button which has the correct color name as the title. The color names and print colors can be mismatched, meaning that for example color name “Green” can be printed in red color.
After each game session you are offered feedback of that session. The game displays a reaction time graph, some statistics of the session, as well as some guidance to improve your results.
GreenRed game allows you to customize the gaming experience. You can choose different length for your game sessions, from 10 seconds up to two minutes. If staying focused on the game during longer session feels too hard, you can shorten the session length and build your concentration from ground up.
You can also change the color palette used in the game. The default colors are red and green, but there are also number of other color options available. For example color blind people might prefer playing the game with color pairs like blue-orange or blue-red. Let us know if you want to have different color options available.
For multilingual users the game offers possibilities to play the game using one the six available languages (English, French, German, Spanish, Swedish and Finnish). You can try if your cognition is faster in your native tongue than with your secondary languages. And why not try learning color names in a new language? You might find that you are faster when using a language you are not familiar with!
To allow you to keep track of your progress, the game saves your high scores for each language and session length.
Happy playing!

## Key features

- Stroop effect-based gameplay
- Customizable session length
- Multiple color palettes
- Multilingual support (6 languages)
- Reaction time graphs and statistics
- High score tracking


## Frequently asked questions about GreenRed

### What is the GreenRed game based on?

GreenRed is based on the Stroop effect, a cognitive phenomenon where naming colors of words takes longer when the word itself is a different color name.

### How long can GreenRed game sessions be?

You can customize the length of your game sessions in GreenRed, ranging from 10 seconds up to two minutes, allowing you to build concentration gradually.

### Can I change the colors in GreenRed?

Yes, GreenRed allows you to change the color palette. The default is red and green, but other options are available, including palettes suitable for colorblind individuals.

### Does GreenRed support multiple languages?

Yes, GreenRed offers multilingual support, allowing you to play in English, French, German, Spanish, Swedish, and Finnish. You can test your cognition speed in different languages.

### How does GreenRed track my progress?

GreenRed saves your high scores for each language and session length, enabling you to keep track of your progress and improvements over time.

### What kind of feedback does GreenRed provide?

After each game session, GreenRed offers feedback including a reaction time graph, session statistics, and guidance to help you improve your results.

### Is GreenRed available on multiple devices?

Based on the provided data, GreenRed is supported on iPhone and iPod devices.

### Does GreenRed have ads?

No, the application data indicates that GreenRed does not contain advertisements.

## Version history (last 1 release)

### 1.0.0 — 2020-08-10

No release notes.

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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 2026-07-05.*