HRV4Biofeedback vs dewfall
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
HRV4Biofeedback
This app uses your phone's camera to measure heart rate variability and provide biofeedback. It guides you through deep breathing exercises to improve self-regulation and manage stress. Track your progress and explore correlations with your daily experiences.
- Camera-based HRV measurement
- Real-time heart rate feedback
- Resonant frequency analysis
- Biofeedback score
- Subjective annotations
- HealthKit integration
- Bluetooth sensor support
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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
dewfall
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Read the whole Bible, one verse at a time. A quiet place to read Scripture, keep your place, journal what you hear, and open a deep dive on any verse. dewfall opens where you left off and moves in order: Genesis 1, then 2, then 3 so you never have to remember your spot or wonder where to start. When the names and numbers pile up, tap "Let God decide" for one verse at random. What you can do: • Read cover to cover, chapter by chapter. dewfall remembers exactly where you stopped and picks you right back up. • Open a deep dive on any verse or whole chapter — warm, plain-spoken commentary, written with AI (Anthropic's Claude) and grounded in trusted sources, cross-references, and the original Hebrew and Greek, with every source shown in a References tab. • Journal on any verse. Sit with it, write what comes. Your entries stay private. • Highlight the lines that stay with you — in the verse and in the deep dive. • Find it all again in your Library — every verse you've journaled or highlighted, searchable by words or by what it's about. • Search the whole Bible — by a phrase, a name, or the idea you're chasing. • Watch your journey take shape — a map of all 66 books, verses read, journal entries, streaks, and the rhythm of when you read, all the way to a finish-the-Bible celebration. • Read alongside friends — follow their journeys, see what they're reading, and share what you've highlighted, with clear controls over who sees what. • Read in your language — multiple translations, each in its own tongue, with the app in the language you choose. On iPhone and iPad, dewfall reads offline too. Download a translation once and keep reading on a plane or off the grid — anything you write syncs back when you're online again. Reading the Bible is free, always. So is reading any deep dive that already exists. Sign in only when you want to save any of it — your place, your journals, and your highlights. No passwords to remember. Come read. Keep your place, sit with each verse, and let the whole story open up slowly. Terms of Use: https://dewfall.app/en/terms
Screenshots
Verdict
The clearest difference is price: dewfall at Free against HRV4Biofeedback's $9.99. dewfall also leads on update cadence (every 5 days vs every 2 months). HRV4Biofeedback's advantage is in-app purchases (none vs 2) and chart position (#29 vs unranked). On ads, device support and iOS requirement there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
dewfall is free to download; HRV4Biofeedback costs $9.99 up front. dewfall sells 2 in-app purchases, starting at $9.99 per month. HRV4Biofeedback asks for nothing beyond the download.
HRV4Biofeedback ships an update every 2 months, dewfall every 5 days. The most recent releases landed on October 13, 2026 and September 30, 2026 respectively.
| Parameter | HRV4Biofeedback | dewfall |
|---|---|---|
| Price | $9.99 | Free — better |
| Rating | 3.4 (29 ratings) — better | — |
| Positive reviews | 53.1% of reviews | — |
| Number of ratings | 29 — better | — |
| Update frequency | Every 2 months | Every 5 days — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free | — |
| Best chart rank | #29 — better | — |
| Devices | iPhone, iPod — better | iPhone |
| Requires iOS | 15.6 — better | 16.4 |
| Further details — not scored | ||
| Size | 138 MB | 62 MB |
| Age rating | 4+ | 9+ |
| Developer | A.S.M.A. B.V. | Tejas Kumar |
In-app purchases
HRV4Biofeedback
No in-app purchases
dewfall
- dewfall+ Monthly$9.991 Month
- dewfall+ Annual$89.991 Year









