# iStroopChallenge vs Inkstroop

The clearest difference is ads: iStroopChallenge at none against Inkstroop's shown. iStroopChallenge also leads on device support (3 vs 1) and iOS requirement (15.0 vs 17.0). Inkstroop's advantage is update cadence (every 3 days vs every 6 days). On price and in-app purchases there is nothing between them.

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

iStroopChallenge ships an update every 6 days, Inkstroop every 3 days. The most recent releases landed on September 29, 2026 and September 24, 2026 respectively.

## The numbers

| Metric | iStroopChallenge | Inkstroop |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/istroopchallenge/id6755783575/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 6 days | **Every 3 days** |
| Monetization | Free | — |
| Size | 24 MB | 5 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Steve Hunger](https://appshunter.io/developer/1840531947) | [BIN WANG](https://appshunter.io/developer/1881032464) |

## What reviewers say

### 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


### Inkstroop

[App page](https://appshunter.io/ios/app/inkstroop/id6771827113)

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

**In-app purchases:** none


## Frequently asked questions

### Is iStroopChallenge free?

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

### Is Inkstroop free?

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

### Do iStroopChallenge or Inkstroop have ads?

Inkstroop shows ads; iStroopChallenge does not.

### Which is updated more often, iStroopChallenge or Inkstroop?

iStroopChallenge ships an update every 6 days, and Inkstroop every 3 days. Most recently, iStroopChallenge was updated on September 29, 2026 and Inkstroop on September 24, 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.*