# ReactionTrainer vs DSFL

The clearest difference is in-app purchases: DSFL at none against ReactionTrainer's 1. On price, update cadence, ads and device support there is nothing between them.

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

ReactionTrainer ships an update every 13 months, DSFL every 12 months. The most recent releases landed on September 27, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | ReactionTrainer | DSFL |
| --- | --- | --- |
| 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 12 months** |
| Monetization | Free with in-app purchases | — |
| Size | 8 MB | 41 MB |
| Requires iOS | 12.0 | **11.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 9+ | 17+ |
| Developer | [Bert Torfs BVBA](https://appshunter.io/developer/442917392) | [SportsCAP PTY (LTD)](https://appshunter.io/developer/1438386770) |

## 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 |


### DSFL

[App page](https://appshunter.io/ios/app/dsfl/id6479238117)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is ReactionTrainer free?

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

### Is DSFL free?

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

### Do ReactionTrainer or DSFL have ads?

Neither ReactionTrainer nor DSFL shows ads.

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

ReactionTrainer ships an update every 13 months, and DSFL every 12 months. Most recently, ReactionTrainer was updated on September 27, 2026 and DSFL on October 1, 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.*