# Reaction SR

> Reaction SR (iPhone/iPad app by Viacheslav Romanenko.)

- Source: https://appshunter.io/ios/app/reaction-sr/id1047244230 (this page in markdown: same URL + `.md`)
- Developer: [Viacheslav Romanenko](https://appshunter.io/developer/1046372418)
- Category: Education, Sports
- Price: $0.99
- Age rating: 4+
- Requires: iOS 12.0 · 9 MB
- Languages: English
- Released: 2015-10-15
- Data updated: 2026-05-19
- User reviews in markdown: https://appshunter.io/ios/app/reaction-sr/id1047244230/reviews.md

## What is Reaction SR?

Testing sensorimotor reaction. 
* This app allows you to determine how quickly the user responds to a visual or acoustical signal. Press on the blue circle and interrupt the contact when the red circle appears. The resulting test time demonstrates a simple sensorimotor reaction of the user.
* Results of testing. At the choice of 12 attempts the result includes: average value (ms), normality of distribution of the received results according to the Shapiro-Wilk criterion (W). At the choice of 15-30 attempts: average value (ms) and SE (Standard Error).
* This app can be used by athletes and teachers of specialized educational institutions in their scientific research.

WARNING: NOT FOR MEDICAL USE.
If the importance of sensory-motor response is critical to your health, you should consult your doctor. The results of the assessment of sensory motor reactions are intended for informational and educational purposes only.


## Version history (last 1 release)

### 1.1.6 — 2021-01-16

Bug fixes.

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## More apps by Viacheslav Romanenko

- [Reaction SM](https://appshunter.io/ios/app/reaction-sm/id1046372419)
- [Reaction RC](https://appshunter.io/ios/app/reaction-rc/id1048447733)
- [Reaction RMO](https://appshunter.io/ios/app/reaction-rmo/id1049901807)
- [Reaction RD](https://appshunter.io/ios/app/reaction-rd/id1050398610)
- [Reaction CDO](https://appshunter.io/ios/app/reaction-cdo/id1051308948)

All apps by Viacheslav Romanenko: https://appshunter.io/developer/1046372418

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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 2026-05-19.*