# Reaction RCHR

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

- Source: https://appshunter.io/ios/app/reaction-rchr/id1260349886 (this page in markdown: same URL + `.md`)
- Developer: [Viacheslav Romanenko](https://appshunter.io/developer/1046372418)
- Category: Education, Sports
- Price: Free
- Age rating: 4+
- Requires: iOS 10.0 · 15 MB
- Languages: English
- Released: 2017-07-20
- Data updated: 2026-06-10
- User reviews in markdown: https://appshunter.io/ios/app/reaction-rchr/id1260349886/reviews.md

## What is Reaction RCHR?

Testing sensorimotor reaction (Reaction of a choice) and also registration and the analysis of changes of heart rate. "Reaction RCHR" defines relationship between heart rate and reaction of a choice. Number of attempts: 15-33. Heart rate registration of with use of the sensor (Bluetooth 4.0, Heart rate Monitor chest strap). 
Results: duration test; quantity of errors; primary heart rate value.
For reaction time and heart rate:
- max, min;
- average value;
- extent of variation;
- coefficient of variation;
- standard deviation.

WARNING: NOT FOR MEDICAL USE
If knowing your pulse rate is critical to your health, you need to have your pulse taken by a medical professional. "Reaction RCHR" is not intended to diagnose, prevent or treat any condition, or to be a substitute for professional medical care. Measurements and statistics are intended for informational and educational purposes only.


## Version history (last 1 release)

### 1.0.4 — 2019-11-09

Some bugs were fixed.

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## More apps by Viacheslav Romanenko

- [Reaction SM](https://appshunter.io/ios/app/reaction-sm/id1046372419)
- [Reaction SR](https://appshunter.io/ios/app/reaction-sr/id1047244230)
- [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 2026-06-10.*