Kubios HRV

4.0
660 reviews
50K+
Downloads
Content rating
Everyone
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About this app

Kubios HRV app uses scientifically validated heart rate variability (HRV) algorithms (used by scientists all over the world) to provide reliable information about your wellbeing and daily readiness. To make HRV measurements with the app, you need a Bluetooth heart rate (HR) sensor, such as Polar H10. Kubios HRV app has two modes of operation:

1) Readiness Measurement Mode monitors changes in your daily readiness status. By doing short (1-5 min), controlled resting HRV measurements regularly, you will receive reliable information about your physiological recovery and/or stress, how it changes from day to day, and how your HRV values compare with normal population values. Readiness monitoring is used by professional athletes in training optimization but can also be used by sports enthusiasts or anyone interested in their wellbeing, as it provides objective information about overall bodily stress as well as cardiovascular health.

2) Custom Measurement Mode, designed for researchers, health and wellbeing professionals, and sport scientists, conducts various types of HRV recordings. This measurement mode supports test-subject management, short- and longer-term measurements, live data acquisition, as well as event markers. Since the app is built with Polar mobile SDK, it can read live data from Polar sensors, including electrocardiogram (ECG) and heart beat interval (RR) data from Polar H10 sensors and live photoplethysmogram (PPG) and inter-pulse interval (PPI) data from optical Polar OH1 and Verity Sense sensors. Thus, when used together with these Polar sensors, the custom measurement mode will provide an easy-to-use, light-weight, affordable way to obtain ECG, PPG and RR/PPI recordings. Regarding RR recording, the app also supports other Bluetooth HR sensors available on the market. Kubios HRV software license, which supports this measurement mode is required to store measurement data.

HRV is a reliable measure of autonomic nervous system (ANS). It tracks the beat-to-beat changes in RR interval arising from the continuous regulation of heart rate by the sympathetic and parasympathetic branches of the ANS. Kubios HRV analysis algorithms have achieved gold-standard status in scientific research, and our software products are used at roughly 1200 universities in 128 countries. The main HRV parameters include the parasympathetic nervous system (PNS) and sympathetic nervous system (SNS) indexes, the computations of which have been optimized, using a large reservoir of scientific research results, to provide accurate interpretation of recovery and stress.
Updated on
Sep 3, 2025

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
No data shared with third parties
Learn more about how developers declare sharing
This app may collect these data types
Personal info, Health and fitness, and App info and performance
Data is encrypted in transit
You can request that data be deleted

Ratings and reviews

4.2
638 reviews
Steffany Kluttz
December 31, 2025
I did a custom measurement, happen to have had several rare medical episodes during that, and looked to download the data for my doctor. Nothing in history. I looked for an online portal to download data like other apps. All I can find is their website where it looks like you have to pay for a $400+ license to have recorded data. No response from customer support. Who pays $400+ for what other apps do for a minimal subscription? I'll update my review if they make this right.
4 people found this review helpful
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Kubios Oy
January 5, 2026
Thank you for your feedback, and sorry for the frustration. Custom Measurement is currently available only with a Kubios HRV Scientific subscription. Without it, recordings run in demo mode and are not saved. We appreciate your feedback and will consider future options to expand access.
Andy Sawyer
March 23, 2026
Very unreliable - almost every day, I have to start it multiple times, turn my HRM (Polar Verify Sense) off and on multiple times before I can get the app to work. there's no rhyme or reason to it, no obvious pattern to what makes it work/not work. it's incredibly frustrating. when it does work, it gives a useful guide - but it's just so incredibly unreliable that it's barely worth the effort.
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Kubios Oy
March 27, 2026
Sorry to hear about your experience — that sounds frustrating. In most cases, these issues are caused by the sensor being connected to another app or device at the same time. Please contact us at support@kubios.com, and we’ll help you resolve it.
R Malcolm
August 20, 2023
Complete waste of time. So buggy. It frequently fails to load, getting stuck on the company logo. Time scaling on graphs is wrong, the line getting to a minute after about thirty seconds, then not moving until a minute is up and catching up in a big jump. But most annoying of all, analysis frequently fails. You spend three minutes measuring, another few minutes waiting for the wheel to spin and then you're told the analysis has failed for some unknown reason.
13 people found this review helpful
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What’s new

– Added support for sensorless, accelerometer-based HRV readiness measurement (beta) — monitor your stress and recovery without a heart rate sensor.
– Performance improvements and minor bug fixes.