# ReactionTrainer vs Sprint Start Trainer

The clearest difference is rating: Sprint Start Trainer at 4.9 against ReactionTrainer's 3.4. Sprint Start Trainer also leads on review sentiment (90% vs 50%) and update cadence (every 3 weeks vs every 13 months). ReactionTrainer's advantage is ads (none vs shown) and device support (3 vs 1). On price, in-app purchases and monetization model there is nothing between them.

Both are free to download. ReactionTrainer sells 1 one-off in-app purchase and Sprint Start Trainer sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Sprint Start Trainer holds the better App Store score, 4.9 against 3.4. Both are backed by a comparable volume of ratings — 5 and 15 respectively. Written reviews point the same way: 50% of ReactionTrainer's written reviews are positive against 90% of Sprint Start Trainer's.

ReactionTrainer ships an update every 13 months, Sprint Start Trainer every 3 weeks. The most recent releases landed on October 10, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | ReactionTrainer | Sprint Start Trainer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.4 (5 ratings)](https://appshunter.io/ios/app/reactiontrainer/id1200534900/reviews) | **[4.9 (15 ratings)](https://appshunter.io/ios/app/sprint-start-trainer/id6473805472/reviews)** |
| Number of ratings | 5 | **15** |
| Positive reviews | 50.0% of reviews | **90.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 13 months | **Every 3 weeks** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 8 MB | 27 MB |
| Requires iOS | **12.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 9+ | 4+ |
| Developer | [Bert Torfs BVBA](https://appshunter.io/developer/442917392) | [Koki Osada](https://appshunter.io/developer/1501162473) |

## 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 |


### Sprint Start Trainer

[App page](https://appshunter.io/ios/app/sprint-start-trainer/id6473805472)

This app provides tools for solo athletic training, offering customizable interval settings for voice cues like "on your marks," "set," and a pistol sound. It features random timing starts with detailed configuration options to simulate various race scenarios.

**Highlights:** Customizable interval settings, Voice cues (on your marks, set, pistol), Random timing start, Detailed timing configuration, Simulates various race scenarios

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $4.99 | one-time |


## Frequently asked questions

### Is ReactionTrainer free?

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

### Is Sprint Start Trainer free?

Sprint Start Trainer is free to download, with in-app purchases available.

### Which has better reviews, ReactionTrainer or Sprint Start Trainer?

Sprint Start Trainer is rated higher. ReactionTrainer averages 3.4 out of 5 from 5 ratings, while Sprint Start Trainer averages 4.9 from 15 ratings.

### Do ReactionTrainer or Sprint Start Trainer have ads?

Sprint Start Trainer shows ads; ReactionTrainer does not.

### Which is updated more often, ReactionTrainer or Sprint Start Trainer?

ReactionTrainer ships an update every 13 months, and Sprint Start Trainer every 3 weeks. Most recently, ReactionTrainer was updated on October 10, 2026 and Sprint Start Trainer on October 14, 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.*