967 reviews
Content rating
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image

About this app

The only scientifically validated HRV app that doesn't require an external sensor. HRV4Training helps you optimize your goals by providing tailored feedback on your physical condition

On compatibility with your phone: the app will detect right away if your phone is supported so that you can always get a refund in case it is not.

HRV4Training in addition to our camera based measurements, bluetooth and ANT sensors, supports the dedicated sensor present in Samsung Galaxy phones as well as the Oura ring.

HRV4Training is also the first app that goes beyond simple measurements and provides insights on:
1) acute or day to day HRV changes in response to different stressors (alcohol, travel, sick days, training, menstruation, etc.)
2) long term multi-parameter trends to look at the big picture
3) correlations between physiological measurements and annotations
4) training load analysis, fitness, fatigue, readiness to perform and injury risk
5) VO2max estimation for runners linking the app to Strava or TrainingPeaks
6) Training Polarization analysis (or 80/20)
7) Weekly and monthly summaries to track progress.

All data is processed inside the app in order to provide you with actionable interpretations that can help optimizing your training plan and performance.

Other features:
- HRV-based advice helps you to adapt your trainings based on objective measures of recovery
- TAGS: lets you tag your sleep, mental energy, muscle fatigue, stress and all other parameters that can help you understand what is influencing your physical condition and physiological stress
- Works with Bluetooth SMART heart rate monitors (a Polar H7 is recommended) or ANT+ heart rate monitors.
- Configurable test (choose test duration between 1, 3 or 5 minutes)
- Shows the PPG signal view to ensure signal quality during the test if the camera is used instead of a sensor
- Extracts and stores the following features while lying down and/or standing: heart rate, mean of beat-to-beat intervals (AVNN), standard deviation of beat-to-beat intervals (SDNN), square root of the mean squared difference of successive R-Rs (rMSSD), number of pairs of successive R-Rs that differ by more than 50 ms (pNN50), low frequency power (LF, 0.04-0.15 Hz), high frequency power (HF, 0.15-0.40 Hz)
- HRV4T Recovery Points to provide a single, straightforward metric to analyze your physical condition
- Population summaries and people like you comparisons to put your data into perspective
- Data export via email or Dropbox
- RR-intervals correction
- Integrates with TrainingPeaks, SportTracks, Genetrainer, Strava and others

More details on HRV and app usage are available here:

More details on HRV using the phone's camera are available here:

HRV4Training requires to register an account with your email address, so that your data can be backed up safely and retrieved in case anything happens (app issue, changing phone, etc.).
Updated on
Sep 28, 2022

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
Location, Personal info and 3 others
Data isn’t encrypted
You can request that data be deleted
967 reviews
A Google user
March 23, 2019
This app offers an extremely low-friction way to gather your daily HRV readings, as you don't have to use an external device, just the camera on your phone. The data seems to track fairly well with other methods of gathering HRV I'm using. That, coupled along with the extensive write-ups on their blog has me convinced the data is accurate. My favorite thing though, is the way it correlates data gathered from your daily questionnaire and other health and fitness services to give you a comprehensive overview of how your training affects your general level of stress. Note: These correlations are not available right away, be sure to give it some time to build up sufficient data to unlock the extra insights before you decide it's not worth it. Given that the app is affordable and doesn't require (but can use) an external sensor, it is an excellent value. You can pay much more and get less in other places.
20 people found this review helpful
Did you find this helpful?
A Google user
March 24, 2020
Wasted so many hours on this app. Trying to take a simple 5 minute HRV reading turns in to a massive time suck. You have to stay on the screen, or it will fail. If you get a pop-up notification during reading it will fail. Try another app if your time is valuable. RESPONSE TO DEV: Well the handful of people I know who've tried the app have all complained about the same "usually no need" seems very narrow minded.
14 people found this review helpful
Did you find this helpful?
A.S.M.A. B.V.
March 25, 2020
Dear Josh, thank you for your message and sorry to hear about the trouble. If you can take a minute to reach out directly at then we can better understand your use case and see what we can do to help. Thank you and take care
Crinda Jorgensen
March 9, 2022
Poor support and functionality on Android. Worked ok on an old phone but can't get a reading at all after I was forced to upgrade by 3G phasing out. So don't bother downloading this if you have a newer phone with multiple cameras. FYI to the dev, when I test the camera it says "good news your phone is compatible with the app but the reading quality was bad, please try again." There is no mention of this problem on the website or how to fix it, and no way to contact anyone to ask for help.
7 people found this review helpful
Did you find this helpful?

What's new

* added the possibility to display rMSSD in the homepage for Pro users. You can try Pro for free by logging in here:


If you like the updates, please take a few minutes to the review the app. It makes a difference. Thank you!

For any issues, contact:

p.s. let us know if you'd like to experiment more. Happy to send you Camera HRV for free.

Marco & Ale