# HRV4Biofeedback vs FatigueSense

The clearest difference is price: FatigueSense at Free against HRV4Biofeedback's $9.99. FatigueSense also leads on rating (4.5 vs 3.4) and update cadence (daily vs every 2 months). HRV4Biofeedback's advantage is chart position (#103 vs unranked) and iOS requirement (15.6 vs 17.0). On ratings volume, ads, in-app purchases and monetization model there is nothing between them.

FatigueSense is free to download; HRV4Biofeedback costs $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.

FatigueSense holds the better App Store score, 4.5 against 3.4. Both are backed by a comparable volume of ratings — 29 and 36 respectively. Written reviews point the same way: 53% of HRV4Biofeedback's written reviews are positive against 81% of FatigueSense's.

HRV4Biofeedback ships an update every 2 months, FatigueSense daily. The most recent releases landed on October 27, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | HRV4Biofeedback | FatigueSense |
| --- | --- | --- |
| Price | $9.99 | **Free** |
| Rating | [3.4 (29 ratings)](https://appshunter.io/ios/app/hrv4biofeedback/id1504638613/reviews) | **[4.5 (36 ratings)](https://appshunter.io/ios/app/fatiguesense/id6759190693/reviews)** |
| Number of ratings | 29 | **36** |
| Positive reviews | 53.1% of reviews | **81.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Daily** |
| Monetization | Free | Free |
| Best chart rank | **#103** | — |
| Size | 138 MB | 48 MB |
| Requires iOS | **15.6** | 17.0 |
| Devices | iPhone, iPod | **iPhone, iPad, Apple Watch** |
| Age rating | 4+ | 17+ |
| Developer | [A.S.M.A. B.V.](https://appshunter.io/developer/1066843463) | [Nana Abaogye](https://appshunter.io/developer/1787898108) |

## What reviewers say

### HRV4Biofeedback

[App page](https://appshunter.io/ios/app/hrv4biofeedback/id1504638613)

**Currently charting:** #103 Top Paid · Lifestyle (US App Store)

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.

**Highlights:** Camera-based HRV measurement, Real-time heart rate feedback, Resonant frequency analysis, Biofeedback score, Subjective annotations, HealthKit integration, Bluetooth sensor support

**Features:** Vision Pro support

**In-app purchases:** none


### FatigueSense

[App page](https://appshunter.io/ios/app/fatiguesense/id6759190693)

This app helps you understand and manage your energy levels by linking wearable data with daily check-ins. It provides insights into activity, recovery, and fatigue to help you pace your days and avoid crashing. Designed for individuals managing persistent fatigue conditions.

**Highlights:** Daily energy budget tracking, Early PEM signal alerts, Strain, recovery, HRV, RHR, and sleep tracking, Activity planning within energy envelope, Crash logging and individual pattern learning, Wearable device integration (Apple Watch, Oura, Garmin, etc.), Manual daily entry option

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is HRV4Biofeedback free?

HRV4Biofeedback costs $9.99, with no in-app purchases.

### Is FatigueSense free?

FatigueSense is free to download, with no in-app purchases.

### Which has better reviews, HRV4Biofeedback or FatigueSense?

FatigueSense is rated higher. HRV4Biofeedback averages 3.4 out of 5 from 29 ratings, while FatigueSense averages 4.5 from 36 ratings.

### Do HRV4Biofeedback or FatigueSense have ads?

Neither HRV4Biofeedback nor FatigueSense shows ads.

### Which is updated more often, HRV4Biofeedback or FatigueSense?

HRV4Biofeedback ships an update every 2 months, and FatigueSense daily. Most recently, HRV4Biofeedback was updated on October 27, 2026 and FatigueSense on October 25, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*