1.05K reviews
Content rating
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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
Nov 4, 2023

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 is encrypted in transit
You can request that data be deleted

Ratings and reviews

1.04K reviews
Samantha Lane
September 14, 2023
Convenient way to take HRV. I bought this because I didn't fancy mucking around with chest straps every morning to take my HRV. I can get a consistent good-optimal reading in a dark room with my finger over the camera and flash (on my phone they don't line up with the axis of the phone so I turn the phone almost to landscape to cover both). I've dropped my review to 3 stars 'cause its been 6 months since I complained that the dates aren't right in the dropbox export and nothing has been done.
3 people found this review helpful
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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.
27 people found this review helpful
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Alex Flynn
November 12, 2022
Bought this years ago and keeping checking in every other years to see if this app works - but nope. Taking readings using a camera phone is sub-optimal. Tested this on 7 devices from various manufacturers on both Android and iOS. I followed the documentation to the T, and judging by similar compaints from other users, it is not PICNIC sort of issue.
3 people found this review helpful
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What's new

* All users can now migrate to the new HRV4Training Pro. Please see how, 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: or @altini_marco on Twitter

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

Marco & Ale