# Stroop! vs iStroopChallenge

The clearest difference is review sentiment: iStroopChallenge at 100% against Stroop!'s 25%. iStroopChallenge also leads on rating (5.0 vs 3.9) and ads (none vs shown). Stroop!'s advantage is ratings volume (7 vs 1) and iOS requirement (11.0 vs 15.0). On price, in-app purchases and device support there is nothing between them.

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

iStroopChallenge holds the better App Store score, 5.0 against 3.9. That said, the two scores are not equally well evidenced: Stroop! has 7 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 25% of Stroop!'s written reviews are positive against 100% of iStroopChallenge's.

Stroop! ships an update every 2 weeks, iStroopChallenge every 6 days. The most recent releases landed on September 29, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | Stroop! | iStroopChallenge |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.9 (7 ratings)](https://appshunter.io/ios/app/stroop-brain-training/id1503193092/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/istroopchallenge/id6755783575/reviews)** |
| Number of ratings | **7** | 1 |
| Positive reviews | 25.0% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 2 weeks | **Every 6 days** |
| Monetization | Ad-supported | **Free** |
| Size | 86 MB | 24 MB |
| Requires iOS | **11.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Yukihiro Kadono](https://appshunter.io/developer/1502517927) | [Steve Hunger](https://appshunter.io/developer/1840531947) |

## What reviewers say

### Stroop!

[App page](https://appshunter.io/ios/app/stroop-brain-training/id1503193092)

This colorful puzzle game challenges your perception and reaction time. Match the color of the word to the word's actual color, not the word itself, under a strict time limit. Compete for high scores in this engaging brain-training experience.

**Highlights:** Color word matching, Time-limited challenges, High score competition, Multilingual word support, Reverse Stroop Effect gameplay

**Features:** macOS Compatibility

**In-app purchases:** none


### iStroopChallenge

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

Engage in a classic psychological test transformed into an addictive mobile game. Challenge your cognitive speed by identifying ink colors, not word meanings, in a fun and effective brain training experience.

**Highlights:** Timed and endless game modes, Adaptive difficulty settings, Multiplayer challenges, Achievements and leaderboards, Color blind accessibility, Multiple themes, Detailed statistics

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

**In-app purchases:** none


## Frequently asked questions

### Is Stroop! free?

Stroop! 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, Stroop! or iStroopChallenge?

iStroopChallenge is rated higher. Stroop! averages 3.9 out of 5 from 7 ratings, while iStroopChallenge averages 5.0 from 1 ratings.

### Do Stroop! or iStroopChallenge have ads?

Stroop! shows ads; iStroopChallenge does not.

### Which is updated more often, Stroop! or iStroopChallenge?

Stroop! ships an update every 2 weeks, and iStroopChallenge every 6 days. Most recently, Stroop! was updated on September 29, 2026 and iStroopChallenge on October 14, 2026.

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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.*