# Reaction Lab vs Reaction Time Test

The clearest difference is in-app purchases: Reaction Time Test at none against Reaction Lab's 2. Reaction Time Test also leads on update cadence (every 2 months vs every 7 months) and device support (3 vs 1). On price, rating, ratings volume and ads there is nothing between them.

Both are free to download. Reaction Lab sells 2 in-app purchases, starting at $1.99 per month. Reaction Time Test asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for Reaction Lab against 5.0 for Reaction Time Test. Both are backed by a comparable volume of ratings — 2 and 1 respectively.

Reaction Lab ships an update every 7 months, Reaction Time Test every 2 months. The most recent releases landed on October 12, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Reaction Lab | Reaction Time Test |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (2 ratings)](https://appshunter.io/ios/app/reaction-lab-reflex-tests/id6757831974/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/reaction-time-test-reflex/id6765722492/reviews) |
| Number of ratings | **2** | 1 |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 7 months | **Every 2 months** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 22 MB | 41 MB |
| Requires iOS | 18.0 | **15.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Anthony Harvey](https://appshunter.io/developer/1478197285) | [Gunawan Santoso](https://appshunter.io/developer/1843786072) |

## What reviewers say

### Reaction Lab

[App page](https://appshunter.io/ios/app/reaction-lab-reflex-tests/id6757831974)

Measure and improve your response speed with a suite of scientifically-inspired tests. Track progress over time with detailed analytics and gain insights into your performance in various situations. Designed for focus and privacy, all data stays on your device.

**Highlights:** Multiple reaction time test types, Visual, audio, and haptic cues, Grip-release and motion-based tests, Dual-task and fatigue tracking, Detailed session summaries and trend charts, On-device data privacy, Offline functionality

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| React Fast Monthly | $1.99 | per month |
| React Fast Yearly | $4.99 | per year |


### Reaction Time Test

[App page](https://appshunter.io/ios/app/reaction-time-test-reflex/id6765722492)

Measure and improve your reaction speed, tap speed, memory, and coordination with a variety of engaging tests. Track your progress over time with detailed statistics and see how you compare to others. This app offers a fun way to train your brain daily.

**Highlights:** 8 reaction and brain training tests, Track personal bests and trends, Percentile ranking against other users, Consistency and accuracy scores, Independent skill tracking, Daily streaks for habit building, Shareable result cards

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

**In-app purchases:** none


## Frequently asked questions

### Is Reaction Lab free?

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

### Is Reaction Time Test free?

Reaction Time Test is free to download, with no in-app purchases.

### Which has better reviews, Reaction Lab or Reaction Time Test?

Reaction Lab and Reaction Time Test are both rated 5.0 out of 5 on the App Store, from 2 and 1 ratings respectively.

### Do Reaction Lab or Reaction Time Test have ads?

Neither Reaction Lab nor Reaction Time Test shows ads.

### Which is updated more often, Reaction Lab or Reaction Time Test?

Reaction Lab ships an update every 7 months, and Reaction Time Test every 2 months. Most recently, Reaction Lab was updated on October 12, 2026 and Reaction Time Test on October 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.*