# ReactionTrainer vs OpenTrack Judge

The clearest difference is in-app purchases: OpenTrack Judge at none against ReactionTrainer's 1. OpenTrack Judge also leads on update cadence (every 3 months vs every 13 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. ReactionTrainer sells 1 one-off in-app purchase. OpenTrack Judge asks for nothing beyond the download.

ReactionTrainer ships an update every 13 months, OpenTrack Judge every 3 months. Both last shipped on October 24, 2026.

## The numbers

| Metric | ReactionTrainer | OpenTrack Judge |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.4 (5 ratings)](https://appshunter.io/ios/app/reactiontrainer/id1200534900/reviews)** | — |
| Number of ratings | **5** | — |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 13 months | **Every 3 months** |
| Monetization | Free with in-app purchases | — |
| Size | 8 MB | 28 MB |
| Requires iOS | 12.0 | 12.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 9+ | 4+ |
| Developer | [Bert Torfs BVBA](https://appshunter.io/developer/442917392) | [Sportity OU](https://appshunter.io/developer/1344934433) |

## What reviewers say

### ReactionTrainer

[App page](https://appshunter.io/ios/app/reactiontrainer/id1200534900)

Improve your sprint starts with this reflex training app. It simulates race conditions with audio and visual cues, measuring your reaction time to help you achieve faster race starts. Unlock full features with an in-app purchase.

**Highlights:** Simulated race starts with audio cues, Visual clues for 'Ready' and 'Shot', Reaction time measurement, History and graph analysis, Sound and visual clue toggles, 3D Touch support for faster starts

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| ReactionTrainer Unlock | $0.99 | one-time |


### OpenTrack Judge

[App page](https://appshunter.io/ios/app/opentrack-judge/id6465991658)

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

**In-app purchases:** none


## Frequently asked questions

### Is ReactionTrainer free?

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

### Is OpenTrack Judge free?

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

### Do ReactionTrainer or OpenTrack Judge have ads?

Neither ReactionTrainer nor OpenTrack Judge shows ads.

### Which is updated more often, ReactionTrainer or OpenTrack Judge?

ReactionTrainer ships an update every 13 months, and OpenTrack Judge every 3 months. Most recently, ReactionTrainer was updated on October 24, 2026 and OpenTrack Judge 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.*