HRV4Training

A.S.M.A. B.V.

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, supports the Oura ring, Coros watches and Bluetooth sensors (e.g. a Polar chest strap, our recommendation)

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
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)
- 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)
- Population summaries and people like you comparisons to put your data into perspective
- Data export via email
- RR-intervals correction
- Integrates with TrainingPeaks, Strava and others

More details on HRV and app usage are available here:
http://www.hrv4training.com/quickstart-guide.html

and here: https://marcoaltini.substack.com/

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.).

Ratings and reviews

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.

Used to be great until something started happening with the Oura Sync. Devs were responsive but ultimately never solved the problem. The quick fix of "backup all" on Oura worked a few times, clearing caches worked a few times. Now nothing is working and I'm losing days of readings because I need to do this in the morning - not trying to remember it later in the day when it's not as relevant. Please fix this and I'll be happy to give it 5 stars because it used to be a great app.

I really wanted to like it, but the app is unusable on a Google Pixel 8 Pro. Not sure it's the distance between camera and flash, but the readings are always poor quality. At the price point for the app, you would wish they have a better tracking of which phones are truly compatible with the measurement.

What’s new

* You can try HRV4Training Pro here: https://hrv4training.web.app and use code AND30 for a 30% discount

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If you find the app useful, please take a few minutes to the review it. It makes a difference. Thank you!

For any issues, contact: [e-mail] - we'll do our best to help

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

Cheers,
Marco & Ale