# Stroop Test J vs Feather squadron 2

The clearest difference is price: Feather squadron 2 at Free against Stroop Test J's $1.99. Feather squadron 2 also leads on update cadence (every 5 days vs every 37 months). Stroop Test J's advantage is iOS requirement (8.0 vs 17.6). On ads, in-app purchases and device support there is nothing between them.

Feather squadron 2 is free to download; Stroop Test J costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Stroop Test J ships an update every 37 months, Feather squadron 2 every 5 days. The most recent releases landed on October 6, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | Stroop Test J | Feather squadron 2 |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Rating | **[2.0 (1 ratings)](https://appshunter.io/ios/app/stroop-test-j/id1095221202/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 37 months | **Every 5 days** |
| Monetization | Paid | — |
| Size | 1 MB | 18 MB |
| Requires iOS | **8.0** | 17.6 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Takuya Kawakami](https://appshunter.io/developer/721449462) | [Acoustic Pioneer](https://appshunter.io/developer/619517178) |

## What reviewers say

### Stroop Test J

[App page](https://appshunter.io/ios/app/stroop-test-j/id1095221202)

This application administers the Stroop test to assess cognitive functions like response inhibition and attention. It measures performance by timing task completion and counting mistakes, with higher scores indicating greater impairment.

**Highlights:** Administers Stroop test, Measures response inhibition, Assesses attention ability, Records task completion time, Counts mistakes, Reports results for impairment assessment

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

**In-app purchases:** none


### Feather squadron 2

[App page](https://appshunter.io/ios/app/feather-squadron-2/id6670747895)

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

**In-app purchases:** none


## Frequently asked questions

### Is Stroop Test J free?

Stroop Test J costs $1.99, with no in-app purchases.

### Is Feather squadron 2 free?

Feather squadron 2 is free to download, with no in-app purchases.

### Do Stroop Test J or Feather squadron 2 have ads?

Neither Stroop Test J nor Feather squadron 2 shows ads.

### Which is updated more often, Stroop Test J or Feather squadron 2?

Stroop Test J ships an update every 37 months, and Feather squadron 2 every 5 days. Most recently, Stroop Test J was updated on October 6, 2026 and Feather squadron 2 on October 3, 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.*