# ReactionTrainer vs FDM

The clearest difference is review sentiment: ReactionTrainer at 50% against FDM's 0%. ReactionTrainer also leads on rating (3.4 vs 1.2). FDM's advantage is in-app purchases (none vs 1) and update cadence (every 2 months vs every 13 months). On price, ratings volume, ads and device support there is nothing between them.

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

ReactionTrainer holds the better App Store score, 3.4 against 1.2. Both are backed by a comparable volume of ratings — 5 and 5 respectively. Written reviews point the same way: 50% of ReactionTrainer's written reviews are positive against 0% of FDM's.

ReactionTrainer ships an update every 13 months, FDM every 2 months. The most recent releases landed on September 27, 2026 and September 24, 2026 respectively.

## The numbers

| Metric | ReactionTrainer | FDM |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.4 (5 ratings)](https://appshunter.io/ios/app/reactiontrainer/id1200534900/reviews)** | [1.2 (5 ratings)](https://appshunter.io/ios/app/fdm/id1269568371/reviews) |
| Number of ratings | 5 | 5 |
| Positive reviews | **50.0% of reviews** | 0.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 13 months | **Every 2 months** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 8 MB | 13 MB |
| Requires iOS | **12.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 9+ | 4+ |
| Developer | [Bert Torfs BVBA](https://appshunter.io/developer/442917392) | [Freelap SA](https://appshunter.io/developer/1068866607) |

## 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 |


### FDM

[App page](https://appshunter.io/ios/app/fdm/id1269568371)

Manage and configure your Freelap timing devices wirelessly via Bluetooth. Update firmware, change device names, and ensure your equipment is ready for use.

**Highlights:** Bluetooth configuration, Device firmware updates, Rename devices, Manage Freelap devices

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is ReactionTrainer free?

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

### Is FDM free?

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

### Which has better reviews, ReactionTrainer or FDM?

ReactionTrainer is rated higher. ReactionTrainer averages 3.4 out of 5 from 5 ratings, while FDM averages 1.2 from 5 ratings.

### Do ReactionTrainer or FDM have ads?

Neither ReactionTrainer nor FDM shows ads.

### Which is updated more often, ReactionTrainer or FDM?

ReactionTrainer ships an update every 13 months, and FDM every 2 months. Most recently, ReactionTrainer was updated on September 27, 2026 and FDM on September 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.*