# Reaction Time vs Stroop Training

The clearest difference is in-app purchases: Stroop Training at none against Reaction Time's 1. Stroop Training also leads on iOS requirement (15.0 vs 18.0). Reaction Time's advantage is update cadence (weekly vs every 2 weeks). On price, ads and device support there is nothing between them.

Both are free to download. Reaction Time sells 1 one-off in-app purchase. Stroop Training asks for nothing beyond the download.

Reaction Time ships an update weekly, Stroop Training every 2 weeks. The most recent releases landed on September 9, 2026 and September 13, 2026 respectively.

## The numbers

| Metric | Reaction Time | Stroop Training |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | Yes | Yes |
| Update frequency | **Weekly** | Every 2 weeks |
| Size | 20 MB | 28 MB |
| Requires iOS | 18.0 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 9+ |
| Developer | [Songyu Li](https://appshunter.io/developer/1228658214) | [豪 陈](https://appshunter.io/developer/1852919038) |

## What reviewers say

### Reaction Time

[App page](https://appshunter.io/ios/app/reaction-time-test-and-training/id6544800564)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Lifetime Pass | $0.99 | one-time |


### Stroop Training

[App page](https://appshunter.io/ios/app/stroop-training-brain-test/id6761408832)

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

**In-app purchases:** none


## Frequently asked questions

### Is Reaction Time free?

Reaction Time is free to download, with in-app purchases available.

### Is Stroop Training free?

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

### Do Reaction Time or Stroop Training have ads?

Both Reaction Time and Stroop Training show ads.

### Which is updated more often, Reaction Time or Stroop Training?

Reaction Time ships an update weekly, and Stroop Training every 2 weeks. Most recently, Reaction Time was updated on September 9, 2026 and Stroop Training on September 13, 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.*