# HRV4Biofeedback > Camera-based biofeedback app Canonical page: [https://chrome-stats.com/d/id1504638613](https://chrome-stats.com/d/id1504638613) ## Overview - **ID:** `id1504638613` - **Platform:** Apple - **Type:** Apple app - **Status:** Available - **Publisher:** A.S.M.A. B.V. - **Category:** Lifestyle - **Rating:** 3.40 / 5 (29 ratings) - **Version:** 1.4.8 - **Last updated:** 2026-09-08 - **First published:** 2020-06-02 - **Size:** 138 MB - **Data as of:** 2026-09-21 - **Store listing:** [Apple App Store](https://apps.apple.com/us/app/hrv4biofeedback/id1504638613) - **Website:** [https://www.hrv4biofeedback.com/](https://www.hrv4biofeedback.com/) - **Privacy policy:** [https://www.hrv4biofeedback.com/privacy--terms.html](https://www.hrv4biofeedback.com/privacy--terms.html) ## Description 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 ## Rankings - #242,673 — Overall ## 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. ## Similar extensions and apps - [HRV4Training](https://chrome-stats.com/d/id686923970) — 3.60 / 5 - [HRVibe — Breathe & HRV](https://chrome-stats.com/d/id6760731283) - [Optimal HRV: Biofeedback](https://chrome-stats.com/d/id1501292206) — 3.00 / 5 - [BioSign HRV](https://chrome-stats.com/d/id1609779336) — 5.00 / 5 - [Stress Meter Pro:](https://chrome-stats.com/d/id6758636370) - [WatchMyHRV](https://chrome-stats.com/d/id6743650604) — 4.50 / 5 - [HRV Tracker & Stress Monitor](https://chrome-stats.com/d/id6474119886) — 4.50 / 5 - [HeartBreath HRV](https://chrome-stats.com/d/id1380171851) — 4.70 / 5 - [HRV Dojo: Biofeedback Trainer](https://chrome-stats.com/d/id6771740333) - [Heart Rate & HRV Monitor](https://chrome-stats.com/d/id6760419612) — 5.00 / 5 - [HeartRythme Heart Rate Monitor](https://chrome-stats.com/d/id6755351648) - [Heart Rate Tracker - Heartbeat](https://chrome-stats.com/d/id6745460183) — 5.00 / 5 --- Source: [Chrome-Stats](https://chrome-stats.com/d/id1504638613)