# HRV4Biofeedback — Camera-based biofeedback app > Camera-based biofeedback app for stress management and self-regulation. (iPhone/iPad app by A.S.M.A. B.V..) - Source: https://appshunter.io/ios/app/hrv4biofeedback/id1504638613 (this page in markdown: same URL + `.md`) - Developer: [A.S.M.A. B.V.](https://appshunter.io/developer/1066843463) - Category: Lifestyle, Health & Fitness - Price: $9.99 - Rating: 3.40/5 from 29 App Store ratings · 32 written reviews indexed - Age rating: 4+ - Requires: iOS 15.6 · 138 MB - Languages: American English, French (France), Italian - Released: 2020-06-02 - Data updated: 2026-08-29 - Monetization: free - User reviews in markdown: https://appshunter.io/ios/app/hrv4biofeedback/id1504638613/reviews.md ## What is HRV4Biofeedback? Improve self-regulation and better cope with stress using HRV4Biofeedback, the camera-based Heart Rate Variability (HRV) Biofeedback app APP FEATURES: > camera-based biofeedback measurement showing real-time heart rate > spot check measurements at rest > frequency power spectrum > biofeedback score to quantify the effectiveness of the practice in terms of deep breathing and duration > resonant frequency analysis to determine the optimal breathing rate for your sessions > semi-real time HRV analysis > alternative manual breathing rate configuration between 4.5 and 8.5 breaths / minute > subjective annotations, including up to 5 personalized questions > current streak > explore correlations between subjective annotations and biofeedback data > Integration with HealthKit (you can write heart rate, HRV and Mindful minutes) > weekly and monthly summaries > support for Bluetooth sensors > background nature sounds > vibration to guide you through the practice WHAT'S BIOFEEDBACK? Heart Rate Variability (HRV) Biofeedback is a technique that can directly affect physiological and psychological factors through deep breathing exercises and is an ideal strategy to help us self-regulate and better cope with stressful situations​ Practically speaking, HRV Biofeedback consists of providing an individual with real-time feedback on instantaneous heart rate and respiration changes while being instructed to breathe at low frequencies You can learn more about the psychological and physiological benefits of deep breathing and HRV Biofeedback, at HRV4Biofeedback.com HOW CAN I BENEFIT FROM BIOFEEDBACK? Life can be demanding, from both a physical and psychological point of view ​Our health and performance can be affected by how we are able to effectively cope with stressful situations and deal with anxiety, or in broader terms, our ability to emotionally self-regulate is key The goal of HRV Biofeedback is to improve self-regulation, therefore impacting positively our health and performance LEARN MORE: - App features: https://www.hrv4biofeedback.com/faq.html - An introduction to biofeedback: https://www.hrv4biofeedback.com/blog/a-primer-on-heart-rate-variability-biofeedback - How to use the camera measurement: https://www.hrv4biofeedback.com/blog/guidelines-and-best-practices-for-camera-based-measurements Supported devices for the camera measurement: iPhones 8 and onwards HRV4Biofeedback 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.) The validation of the camera-based heart rate measurement is available here: https://www.researchgate.net/publication/315059917_Comparison_of_Heart_Rate_Variability_Recording_With_Smart_Phone_Photoplethysmographic_Polar_H7_Chest_Strap_and_Electrocardiogram_Methods ## Key features - Camera-based HRV measurement - Real-time heart rate feedback - Resonant frequency analysis - Biofeedback score - Subjective annotations - HealthKit integration - Bluetooth sensor support ## Chart rankings - #56 in Top Paid · Lifestyle (US App Store) ## Recent user reviews (10 of 32) All indexed reviews: https://appshunter.io/ios/app/hrv4biofeedback/id1504638613/reviews.md ### 1/5 — Crashes *2025-11-21* Unusable ### 1/5 — 指が火傷しそうで計測できません *2025-09-23* iPhoneのカメラ部分が熱くなりすぎてまともに計測できません。 ### 5/5 — Works perfectly *2025-09-23* Not sure why other peeps cannot use it, works perfectly for me with all the features as described. Got it in the package with all the other apps! Marco has really good tips on his blog, insightful! ### 1/5 — Doesn’t work *2025-08-29* 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. ### 1/5 — heart rate varies wildly *2025-08-21* 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 ### 1/5 — Do not use *2025-08-15* It is not possible to log into their portal to get the data. Last blog entry was 2021. I doubt they are still actively supporting their app ### 1/5 — Marche tres mal *2025-08-13* Bugue sans arret. Le feedback ne se fait pas en temps reel donc impossible de savoir ce qui fonctionne. Mauvais achat ### 1/5 — NOT WORKING :( *2025-08-06* I tried EVERYTHING, but I have to registrate- and that is not possible. It always says: ERROR 200 I spent 9,99 € for anger and not for relaxation. ### 5/5 — Excellent app, but could use some updates *2025-07-27* 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. ### 5/5 — My second review *2024-04-05* One of the best health apps. It has helped me increase my hrv be mindful of my breathing throughout the day. Doing two 20 mn sessions a day was needed to get to that point. One thing that is missing is an audio cue for people with bad vision or that dont want to look at the screen especially at night. ## Frequently asked questions about HRV4Biofeedback ### What is HRV4Biofeedback? HRV4Biofeedback is a camera-based application designed to help you improve self-regulation and cope with stress. It utilizes Heart Rate Variability (HRV) biofeedback techniques, guiding you through deep breathing exercises to positively impact your physiological and psychological state. ### How does the camera-based measurement work? The app uses your phone's camera to measure your heart rate variability in real-time. By placing your finger over the camera lens, it can detect subtle changes in blood flow to provide feedback on your physiological responses during breathing exercises. ### What are the key features of HRV4Biofeedback? Key features include camera-based biofeedback measurement with real-time heart rate, spot check measurements, frequency power spectrum analysis, a biofeedback score to quantify practice effectiveness, resonant frequency analysis for optimal breathing rates, and semi-real-time HRV analysis. ### Is HRV4Biofeedback free to use? Yes, the application is available for free. There are no in-app purchases or advertisements mentioned in the provided description, indicating a completely free user experience. ### What devices are supported for the camera measurement? The camera-based measurement feature is supported on iPhones 8 and onwards. This ensures a consistent and reliable experience for users with compatible devices. ## Version history (last 5 releases) ### 1.4.7 — 2026-08-22 Fixed a few issues. You can find additional articles and resources, here: https://marcoaltini.substack.com --- If you like the updates, please take a few minutes to the review the app. It makes a difference. Thanks! For any issues, or quick questions contact: hello@HRV4Training.com Cheers, Marco & Ale ### 1.4.6 — 2026-07-28 Fixed a few issues. You can find additional articles and resources, here: https://marcoaltini.substack.com --- If you like the updates, please take a few minutes to the review the app. It makes a difference. Thanks! For any issues, or quick questions contact: hello@HRV4Training.com Cheers, Marco & Ale ### 1.4.4 — 2026-01-23 Fixed an issue with the Health integration. You can find additional articles and resources, here: https://marcoaltini.substack.com --- If you like the updates, please take a few minutes to the review the app. It makes a difference. Thanks! For any issues, or quick questions contact: hello@HRV4Training.com Cheers, Marco & Ale ### 1.4.2 — 2025-09-22 Added Box Breathing. You can find additional articles and resources, here: https://marcoaltini.substack.com --- If you like the updates, please take a few minutes to the review the app. It makes a difference. Thanks! For any issues, or quick questions contact: hello@HRV4Training.com Cheers, Marco & Ale ### 1.4.1 — 2025-07-06 Minor fixes. You can find additional articles and resources, here: https://marcoaltini.substack.com --- If you like the updates, please take a few minutes to the review the app. It makes a difference. Thanks! For any issues, or quick questions contact: hello@HRV4Training.com Cheers, Marco & Ale ## Apps similar to HRV4Biofeedback | App | Rating | Price | Category | | --- | --- | --- | --- | | [SND Client App](https://appshunter.io/ios/app/snd-client-app/id1567449580) | 5.0 (5) | Free | Lifestyle | | [Contur](https://appshunter.io/ios/app/contur/id1571663000) | — | Free | Lifestyle | | [Miluklub](https://appshunter.io/ios/app/miluklub/id1572279580) | — | Free | Lifestyle | | [Jasmin French](https://appshunter.io/ios/app/jasmin-french/id1567060360) | — | Free | Lifestyle | | [Spa Nijoli & Salon](https://appshunter.io/ios/app/spa-nijoli-and-salon/id1571475440) | 5.0 (1) | Free | Lifestyle | | [Challenge 2021](https://appshunter.io/ios/app/challenge-2021/id1571996360) | — | Free | Lifestyle | ## More apps by A.S.M.A. B.V. - [Heart Rate Variability Logger](https://appshunter.io/ios/app/heart-rate-variability-logger/id683984776) - [HRV4Training](https://appshunter.io/ios/app/hrv4training/id686923970) - [Camera Heart Rate Variability](https://appshunter.io/ios/app/camera-heart-rate-variability/id788460316) All apps by A.S.M.A. B.V.: https://appshunter.io/developer/1066843463 ## Related topics [hrv4biofeedback](https://appshunter.io/ios/topics/hrv4biofeedback) · [hrv biofeedback](https://appshunter.io/ios/topics/hrv-biofeedback) · [biofeedback breathing](https://appshunter.io/ios/topics/biofeedback-breathing) --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-29.*