iPhone Screenshots


Requires a Polar H6/H7/H10 HRM monitor, although it may work with other BLE Bluetooth HRM monitors.

Heart Rate Variability (HRV) is a great indicator of what is going on inside your body. It's a measurement of how well the mind can slow heart rate (HR), which is an indicator of overall health and stress. In general, better health is indicated using HRV when there is more variability from an in-breath (HR speeding up) to an out-breath (HR slowing down). A simple one-minute measurement each day can be enough to predict when it is time to take it easy, to avoid sickness or injury.

This application has some nice features like export RAW RR files for Kubios testing as well as unlimited time testing if you would like to perform other types of HRV tests. Additionally, you can export all data including RR files to DropBox.

What's New

Version 2.3

- Fixed exporting of old RR files
- FIxed Month format for non-English users
- Set Default record method to previously saved method

Customer Reviews

Simple and easy to use


HRV+ Connected on the first try with my Jarv BT monitor. Get your music or podcast app running first, then start HRV and you can listen while you work out and monitor your heart rate.

A nice enhancement would be to plot an exercise session by the second.

Perfect tool for monitoring workout stress


I have tried a few of the HRV apps to help me evaluate my workouts. This works flawlessly and only requires a compatible BT Polar HR. It's simple to use with options to select time and export data. This is the app I like the best!

It works

Caspian III

Clean interface, pairs quickly with my Polar H7. Doesn't hold your information hostage so you need a subscription to access it.
If you are having problems pairing, just dampen the sensors


17.9 MB
Health & Fitness
Requires iOS 8.0 or later. Compatible with iPhone, iPad, and iPod touch.
Age Rating
Rated 4+
© 2014 - ZUZ LLC


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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