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By Alessandra Saviotti

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The only scientifically validated HRV app that doesn't require an external sensor. HRV4Training helps you optimize your goals and prevent overtraining by measuring your Heart Rate Variability and providing tailored feedback on your physical condition. HRV4Training does not require a heart rate monitor, since it can accurately assess your HRV using the phone's camera.

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.

Supported devices for the camera measurement: iPhones 5, 5S, 6, 6S, 6+, 6S+, SE, 7, 7+
Currently unsupported devices for the camera measurement: iPhones 4S, iPads and iPods - These devices require a chest strap.

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 simply your phone's Camera
- Configurable test (single or orthostatic, choose test duration between 1, 3 or 5 minutes)
- 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)
- Shows the PPG signal view to ensure signal quality during the test if the camera is used instead of a bluetooth SMART sensor
- 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
- Analysis of compliance and consistency
- Integrates with the Health app (writes heart rate, and sleep, read sleep time)
- Data export via email or Dropbox
- Integrates with TrainingPeaks, SportTracks, Genetrainer and Strava

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.).

What's New in Version 6.7.6

- TrainingPeaks integration: added support for MTB, xc-skiing and walking
- Sports: added Squash
- Minor improvements and bug fixes.


For any issues or questions, feel free to contact us at - we'll do our best to help.

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

p.s. feel free to contact us if you’d like to take multiple measurement per day and experiment more. Happy to send you a promo code for the Camera HRV app so that you can download it for free.

Marco & Alessandra

iPhone Screenshots

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Customer Reviews

Been looking for this for a while

I have wanted to check HRV for some time but was always limited by the need for a chest strap. I have tried a couple of different chest straps including the Polar H7 and maybe not due to any fault of the device I always had trouble getting a consistent reading. I have a couple of wrist based HRM and even a Scosche arm band but I couldn't find an HRV app that would use the data. I contacted one of the app makers and they said the wrist based was too inaccurate to measure HRV. I heard about this app on endurance planet and am excited to use it based on the ease of taking a reading, the information provided and the science behind it. It helps me answer the eternal question of how should I train today. It gives a solid quantifiable number can use to either push through the mental fog of not wanting to do it or unfounded confidence in feeling great and going all out when that's not the best idea. Everyone says listen to your body, now we are speaking the same language.

Great HRV!

I'm really impressed by this amazing app! I love the fact that I can use the camera to record my HRV (vs. having to wear a chest strap or some other external device). It's the only app that has this feature that's scientifically validated. It was recommended by a leading research nutritionist & elite athlete at a conference I attended. I'm just getting started in this fascinating world of tracking my HRV. So glad to have found such a quality app and super responsive support team!


The camera measurement is accurate, compared to my heart rate monitor, and much easier to use consistently. That is the key. Highly recommended.

View in iTunes
  • $9.99
  • Category: Health & Fitness
  • Updated:
  • Version: 6.7.6
  • Size: 29.3 MB
  • Languages: English, Italian
  • Seller:

Compatibility: Requires iOS 8.0 or later. Compatible with iPhone, iPad, and iPod touch.

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