Published by A.S.M.A. B.V. on Nov 6, 2024

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Why should I report an Issue with HRV4Training?

  1. AppContacter will directly Email your issue/feedback to an apps's customer service once you report an issue and with lots of issues reported, companies will definitely listen to you.
  2. Pulling issues faced by users like you is a good way to draw attention of A.S.M.A. B.V. to your problem using the strength of crowds.
  3. Importantly, customers can learn from other customers in case the issue is a common problem that has been solved before.
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About HRV4Training

1. All data is processed inside the app in order to provide you with actionable interpretations that can help optimizing your training plan and performance. - Works with Bluetooth SMART heart rate monitors (a Polar H7 is recommended) or ANT+ heart rate monitors. - 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.

2. 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. 1) acute or day to day HRV changes in response to different stressors (alcohol, travel, sick days, training, menstruation, etc. 7) Weekly and monthly summaries to track progress.

3. 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.

4. The only scientifically validated HRV app that doesn't require an external sensor.

5. 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. ).

HRV4Training Customer Insights

1. Tried various different measurement ways (sitting, lying in bed, standing) but didn't do any differenceI have a Samsung 7 and this app worked great for the last 2 months but now the baseline screen is blank, the current day's reading is blank, I can't scroll backwards thru the history and every time I open the app, it shuts itself down so that I must open it a second time.

2. It takes a bit of experimentation and practice but once you figure out exactly where to put your finger on the camera and how hard to press it's extremely accurate and consistent.(Note: I use a Garmin HRM-Dual chest strap sensor rather than the camera function.) The data presented is certainly interesting and I'm hoping it helps me to train and avoid the dreaded overtraining.

3. The practice measurement feature with real time ECG/EKG style readout is extremely useful for learning how to get a good reading with your camera.

4. 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).

5. 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.

6. 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.

7. Further, just tried to reinstall and it's hanging on login/register so can't even get into it anymore.Brilliant app, give it time to get your data and it can provide very useful insight.

8. I've tried their recommend HR straps and it takes 10mins mucking around to get a good signal, I've moved to oura and you spend half the day trying to get it to sync up properly.

9. Yes the special measurement function and the research is worth a lot, but the app itself should also be working smoothly for such a priceWhen it works its exactly what is needed for detailed HRV tracking and analysis for athletes.

10. The app itself is a tad bit basic and while all the data and functions can be found, I've found it's UI somewhat wanting and a bit of a chore to delve into their various insights.

11. 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.

Steps to Troubleshoot & Fix HRV4Training Issues

1. Fix HRV4Training Not Working/Crashes/Errors/Unresponsive & Black/White screen:


  1. Restart HRV4Training: Restarting the app will resolve most errors.
  2. Update the HRV4Training App. Here is how:
    1. On Android goto PlayStore » Search for "HRV4Training" » Open HRV4Training » click "Update".
    2. On iPhone, goto AppStore » Your profile » Available Updates » Check for HRV4Training » click "UPDATE".
  3. Clear HRV4Training app cache: Clearing cached data will force your app to retrieve the latest data directly from HRV4Training servers.
    1. On Android, goto Settings » Apps » Select "HRV4Training" » click Storage » click "Clear Cache".
  4. Check HRV4Training app permissions. If any of these permissions required to use your device's features are disenabled, HRV4Training might not work.
  5. Uninstall and reinstall HRV4Training. If nothing else has worked, completely uninstall HRV4Training then reinstall.
  6. Restart your device. Last, restarting your device can often clear most problems causing HRV4Training not working


2. Fix HRV4Training Server issues & Internet Connection


  1. Check network connection: An unstable Internet will make HRV4Training be unable to connect to it's servers. Ensure your wi-fi is working then restart app.
  2. Disable VPN: VPN can cause connection errors and lead to HRV4Training not working. Make sure all VPNs are off
  3. Enable background data: When Background data is turned off, HRV4Training may not be able to connect to the Internet when running in the background.

Reported Issues