# ReactionTrainer — Reactiontraining for sprinters

> App to train sprint reaction times using simulated race starts. (iPhone/iPad app by Bert Torfs BVBA.)

- Source: https://appshunter.io/ios/app/reactiontrainer/id1200534900 (this page in markdown: same URL + `.md`)
- Developer: [Bert Torfs BVBA](https://appshunter.io/developer/442917392)
- Category: Sports, Health & Fitness
- Price: Free with in-app purchases
- Rating: 3.40/5 from 5 App Store ratings · 2 written reviews indexed
- Age rating: 9+
- Requires: iOS 12.0 · 8 MB
- Languages: American English
- Released: 2017-02-08
- Data updated: 2026-06-01
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/reactiontrainer/id1200534900/reviews.md

## What is ReactionTrainer?

Train your reflexes for faster race starts. Here is how it works : 
Push the start button. Then, every 5 seconds
- The app says 'Ready'
- Between 1.5 and 2.5 seconds later (random), your hear a shot
- Tap the screen to simulate a start as fast as you can.
This sequence repeats itself until you push 'Stop'.
Reaction times are stored for later analysis. The free version gives you 5 attempts before issuing a request to buy - just enough to know how it works. Unlocking is available as an in-app purchase. You can force-quit te app to get another 5 attempts, but past attempts will no longer show in the history table and graph. They are kept on file though for when one should choose to buy later.

More features
- Turn sound on or off.
- Turn visual clues on or off (orange dot when 'Ready', green dot when shot sounds)
- On iPhone 6s or later, you can use 3D touch so you can leave your finger on the screen. When the start is given, just push harder.
- Reaction times of less than .01 seconds are considered false starts.
- No publicity.
- Attach your phone on your arm, listen for 'on your marks', (step in the blocks), 'ready' - 'go'. Your phones movement detection will measure your reaction time.

## Key features

- 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

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

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


## Recent user reviews (2 of 2)

All indexed reviews: https://appshunter.io/ios/app/reactiontrainer/id1200534900/reviews.md

### 5/5 — Perfect!

*2024-08-07*

Helps me train my reaction time

### 1/5 — Doesn’t do anything

*2021-01-19*

Literally does nothing

## Frequently asked questions about ReactionTrainer

### How does ReactionTrainer work?

ReactionTrainer simulates race starts by saying 'Ready' and then playing a shot sound randomly between 1.5 and 2.5 seconds later. You tap the screen to simulate a start, and the app measures your reaction time.

### What are the limitations of the free version of ReactionTrainer?

The free version of ReactionTrainer offers 5 attempts. After these attempts, you will be prompted to purchase the full version. You can force-quit the app to reset attempts, but past data may not be saved.

### Can I turn off sounds or visual cues in ReactionTrainer?

Yes, ReactionTrainer allows you to turn the sound on or off, and also to turn visual clues (like the orange and green dots) on or off according to your preference.

### Does ReactionTrainer have ads?

No, ReactionTrainer explicitly states that it has no publicity, meaning it is ad-free.

### What devices is ReactionTrainer compatible with?

ReactionTrainer is supported on iPhone, iPad, and iPod devices. It is rated for ages 9 and up.

### How often is ReactionTrainer updated?

The latest version of ReactionTrainer is 1.9.0, last updated on September 16, 2019. This indicates it has received updates in the past, though the frequency is not specified.

### What is considered a false start in ReactionTrainer?

In ReactionTrainer, reaction times of less than 0.01 seconds are considered false starts, helping you understand the nuances of a quick and valid start.

### How can I unlock all features in ReactionTrainer?

All features in ReactionTrainer can be unlocked through an in-app purchase. This purchase provides full access to the app's capabilities beyond the initial free attempts.

## Version history (last 4 releases)

### 1.9.0 — 2019-09-16

Dark mode on iOS 13.

### 1.8.0 — 2018-03-20

We wanted to take ReActor out on the track - to record our real-world starts. So we added
- On your marks call + some configurable time to step into the blocks
- Movement detection. Attach your phone to your arm and it will register your start as soon as you move.
- Acceleration (10 measurements per second during 0.6, seconds, starting at -0.1 seconds before  the actual start) is registered for later analysis and can be exported as a csv file. (semi-colon separated numbers from x-y-z user acceleration plus yaw, roll and pitch angles)

Any movement 0.5 seconds before or 0.1 seconds after the pistol shoots will be considered a false start. 
ReActor does no longer support screen rotation to avoid rotating the interface when you swing your arms while leaving the blocks.

Some settings can now be toggled on/of by tapping the icon on the main screen.

The graph can be zoomed in/scrolled.

### 1.5.0 — 2017-03-01

The history view has now been expanded
- With an interactive graph showing your attempts over time
- Tap an attempt on the graph to select it in the tableview.
- Attempts can be deleted.

### 1.0 — 2017-02-08

No release notes.

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## More apps by Bert Torfs BVBA

- [OurScoreSheet](https://appshunter.io/ios/app/ourscoresheet/id495224171)
- [HIITList](https://appshunter.io/ios/app/hiitlist/id954889062)
- [TrackGuide](https://appshunter.io/ios/app/trackguide/id1229131392)
- [HIITList Watch](https://appshunter.io/ios/app/hiitlist-watch/id1551301455)

All apps by Bert Torfs BVBA: https://appshunter.io/developer/442917392

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-01.*