Reviews of HRV4Biofeedback

By: A.S.M.A. B.V. App

List of user reviews and ratings for HRV4Biofeedback

Total ratings

3.40 (Rating count: 29)

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Review summary

Users praise HRV4Biofeedback for stress relief, value, and mood-tracking that support a consistent breathwork practice. However, recurring concerns include unreliable camera-based measurements, data sync problems, login friction, unclear visuals, and compatibility bugs on certain iOS versions. Many see strong potential, especially with external device support, but UX and reliability improvements are commonly requested.

Pros

Helps with stress management through regular paced breathing and biofeedback, with many users reporting calm and focus.
Good value for money; described as basic but excellent value for the price.
Provides useful metrics, scores, and mood/trend tracking that help users see progress.
Strong external device compatibility potential (e.g., Polar H10) and suitability for serious users.
Promotes a consistent breathwork practice and daily routine, with features like resting heart rate insights.

Cons

Camera-based HRV/HR readings can be unreliable or inaccurate, leading to doubt about measurements.
Data syncing is unreliable, with data sometimes not saving or syncing properly.
Login/setup friction, including forced sign-in and random logouts.
Breathing visuals and UI are hard to see or understand (low contrast, unclear circle/pacing explanations).
Bugs and compatibility issues on some iOS versions, including occasional freezes or camera issues.

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User Reviews

Recent rating average: 3.60

All time rating average: 3.40

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21% (4)

Date	Author	Comment
2025-08-29	Ro*****	I wanted to try resonance breathing. Saw this on Reddit. This app doesn’t work at all. Save your $10. Use another app like Elite HRV or Optimal HRV.
I wanted to try resonance breathing. Saw this on Reddit. This app doesn’t work at all. Save your $10. Use another app like Elite HRV or Optimal HRV.
2025-08-21	Mi*****	the heart rate isn't recorded accurately. it dropped from 80 to 30 for about a minute and then up 120. i checked it against my apple watch which had me at a steady 80-85. happy to change the review if i'm missing something in how i'm holding my finger over the camera
the heart rate isn't recorded accurately. it dropped from 80 to 30 for about a minute and then up 120. i checked it against my apple watch which had me at a steady 80-85. happy to change the review if i'm missing something in how i'm holding my finger over the camera
2025-07-27	wc*****	This has all that I need for using biofeedback to try to improve my training. It is basic but excellent value. One improvement I'd like to see is better login handling. I've been randomly logged out recently for some reason, and it's a bit of a hassle to log back in. I would also like to see integration with password managers to make this process smoother.
This has all that I need for using biofeedback to try to improve my training. It is basic but excellent value. One improvement I'd like to see is better login handling. I've been randomly logged out recently for some reason, and it's a bit of a hassle to log back in. I would also like to see integration with password managers to make this process smoother.
2023-07-14	Si*****	I’ve really benefitted from regular RF breathing and biofeedback using this app. It’s really helped me manage stress much more effectively. I do wish there were a more robust set of external accessories. I often want to practice hands free, so I don’t need to be holding my phone to use the app, and I’m not aware of an external device that both measures your HRV and gives a vibration and quiet sound indicating the breathing intervals.
I’ve really benefitted from regular RF breathing and biofeedback using this app. It’s really helped me manage stress much more effectively. I do wish there were a more robust set of external accessories. I often want to practice hands free, so I don’t need to be holding my phone to use the app, and I’m not aware of an external device that both measures your HRV and gives a vibration and quiet sound indicating the breathing intervals.
2023-04-28	sk*****	Love this app and what it does but data only syncs and saves for me about half the time. Possibly it’s just a hazard of rural internet but disappointing nonetheless
Love this app and what it does but data only syncs and saves for me about half the time. Possibly it’s just a hazard of rural internet but disappointing nonetheless
2023-02-13	Se*****	I doubted their claim of HRV and HR accuracy. I have a Polar h10 and I compared measurements and to my surprise HRV4BIOFEEDBACK optical sensor accuracy was the same as Polar! Very impressive. I like how you get the scores and can see the effects on mood and whatnot. Helpful to see trends over time. Major criticism is that the breathing visual is hard to see. They need to do something with more contrast. Only rated 4 stars because there is so much more they could do with the biofeedback exercise rather than just breathing. Guided meditation, sound, etc.
I doubted their claim of HRV and HR accuracy. I have a Polar h10 and I compared measurements and to my surprise HRV4BIOFEEDBACK optical sensor accuracy was the same as Polar! Very impressive. I like how you get the scores and can see the effects on mood and whatnot. Helpful to see trends over time. Major criticism is that the breathing visual is hard to see. They need to do something with more contrast. Only rated 4 stars because there is so much more they could do with the biofeedback exercise rather than just breathing. Guided meditation, sound, etc.
2023-02-12	Sq*****	Maybe HRV4BioFeedback is not working with iOs 16.3? Camera flash turns on, stays on, and no measurements take place at all, screens lock up.
Maybe HRV4BioFeedback is not working with iOs 16.3? Camera flash turns on, stays on, and no measurements take place at all, screens lock up.
2022-11-20	ri*****	I bought my iPhone SE just to use these apps, and they do not disappoint. Major boost to daily insight into your health, with a reliable way to induce parasympathetic nervous system response and relax into being a healthier person.
I bought my iPhone SE just to use these apps, and they do not disappoint. Major boost to daily insight into your health, with a reliable way to induce parasympathetic nervous system response and relax into being a healthier person.
2021-10-27	Zë*****	I’ve found this tool incredible helpful for dealing with stress and fatigue. My only improvement would be a more subtle way to notify the peak and trough of the breathing cycle.
I’ve found this tool incredible helpful for dealing with stress and fatigue. My only improvement would be a more subtle way to notify the peak and trough of the breathing cycle.
2021-05-25	In*****	I’ve used HRV4TRAINING for over a year.Recently, I listened to Marco‘s interview with Dr. Khazan, and decided to try out biofeedback. The app pairs well with Dr. Khazan’s book, and I’ve maintained a breathwork practice via the app for a a few weeks. It took me a few weeks to realize the “Power” graph represented my breathing rate. Consider adding an additional label for the layperson such as myself. I wonder if research shows that the optimal resonant frequency changes after some training, and if so, then the app could suggest retesting for your ideal frequency every two weeks or so. I don’t own an Apple Watch, but have friends that do, and I’d like to recommend the app to them. You mention the watch doesn’t deliver live data, but is live data required? If the watch can store up to 20 minutes of HRV data, then send it to the phone for the app to process, doesn’t that work just as well? Even to find your resonant frequency, the app can change the visual breathing pattern, and match time stamps to sync up the frequencies to HRV. Lastly, is it possible to allow the app to operate in the background? I’m using a consumer EEG with an associated iOS meditation app, and would be very curious to record my breathwork while simultaneously recording my brain waves. Great work, sir. Cheers.
I’ve used HRV4TRAINING for over a year.Recently, I listened to Marco‘s interview with Dr. Khazan, and decided to try out biofeedback. The app pairs well with Dr. Khazan’s book, and I’ve maintained a breathwork practice via the app for a a few weeks. It took me a few weeks to realize the “Power” graph represented my breathing rate. Consider adding an additional label for the layperson such as myself. I wonder if research shows that the optimal resonant frequency changes after some training, and if so, then the app could suggest retesting for your ideal frequency every two weeks or so. I don’t own an Apple Watch, but have friends that do, and I’d like to recommend the app to them. You mention the watch doesn’t deliver live data, but is live data required? If the watch can store up to 20 minutes of HRV data, then send it to the phone for the app to process, doesn’t that work just as well? Even to find your resonant frequency, the app can change the visual breathing pattern, and match time stamps to sync up the frequencies to HRV. Lastly, is it possible to allow the app to operate in the background? I’m using a consumer EEG with an associated iOS meditation app, and would be very curious to record my breathwork while simultaneously recording my brain waves. Great work, sir. Cheers.