# GreenRed vs iStroopChallenge

The clearest difference is iOS requirement: GreenRed at 13.2 against iStroopChallenge's 15.0. On price, rating, ratings volume and ads there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

On the App Store both sit at effectively the same score — 5.0 for GreenRed against 5.0 for iStroopChallenge. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

## The numbers

| Metric | GreenRed | iStroopChallenge |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/greenred/id1517335347/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/istroopchallenge/id6755783575/reviews) |
| Number of ratings | 1 | 1 |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | — | Every 6 days |
| Monetization | Free | Free |
| Size | 10 MB | 29 MB |
| Requires iOS | **13.2** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Hartti Suomela](https://appshunter.io/developer/1517335346) | [Steve Hunger](https://appshunter.io/developer/1840531947) |

## What reviewers say

### GreenRed

[App page](https://appshunter.io/ios/app/greenred/id1517335347)

This game challenges your brain by presenting colored words that may not match their text. Test your reaction time and focus by quickly identifying the print color. Customize session length, color palettes, and languages to enhance your cognitive training.

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

**In-app purchases:** none


### iStroopChallenge

[App page](https://appshunter.io/ios/app/istroopchallenge/id6755783575)

Engage your brain with four distinct focus challenges, including the classic Stroop test. Improve self-control, flexibility, memory, and spatial skills through daily puzzles and various game modes. Compete with friends and track your progress with detailed statistics.

**Highlights:** Classic Stroop test, Four distinct focus challenges, Daily puzzles with streaks, Customizable game modes, Friend challenges and leaderboards, Color blind modes, Detailed progress tracking

**Features:** macOS Compatibility, Vision Pro support, iPhone Duo support

**In-app purchases:** none


## Frequently asked questions

### Is GreenRed free?

GreenRed is free to download, with no in-app purchases.

### Is iStroopChallenge free?

iStroopChallenge is free to download, with no in-app purchases.

### Which has better reviews, GreenRed or iStroopChallenge?

GreenRed and iStroopChallenge are both rated 5.0 out of 5 on the App Store, from 1 and 1 ratings respectively.

### Do GreenRed or iStroopChallenge have ads?

Neither GreenRed nor iStroopChallenge shows ads.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*