# Reaction Workout Timer vs Reaction Lab

The clearest difference is in-app purchases: Reaction Workout Timer at none against Reaction Lab's 2. Reaction Workout Timer also leads on update cadence (every 3 weeks vs every 7 months). On price, ads, device support and iOS requirement there is nothing between them.

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

Reaction Workout Timer ships an update every 3 weeks, Reaction Lab every 7 months. The most recent releases landed on October 13, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | Reaction Workout Timer | Reaction Lab |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/reaction-lab-reflex-tests/id6757831974/reviews)** |
| Number of ratings | — | **2** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 7 months |
| Monetization | — | Free with in-app purchases |
| Size | 8 MB | 22 MB |
| Requires iOS | 18.2 | **18.0** |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Hitfire Production AB](https://appshunter.io/developer/1517601288) | [Anthony Harvey](https://appshunter.io/developer/1478197285) |

## What reviewers say

### Reaction Workout Timer

[App page](https://appshunter.io/ios/app/reaction-workout-timer/id6755075522)

**Features:** macOS Compatibility

**In-app purchases:** none


### 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 |


## Frequently asked questions

### Is Reaction Workout Timer free?

Reaction Workout Timer is free to download, with no in-app purchases.

### Is Reaction Lab free?

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

### Do Reaction Workout Timer or Reaction Lab have ads?

Neither Reaction Workout Timer nor Reaction Lab shows ads.

### Which is updated more often, Reaction Workout Timer or Reaction Lab?

Reaction Workout Timer ships an update every 3 weeks, and Reaction Lab every 7 months. Most recently, Reaction Workout Timer was updated on October 13, 2026 and Reaction Lab on October 12, 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.*