# Camera Heart Rate Variability vs TYDE Study

The clearest difference is price: TYDE Study at Free against Camera Heart Rate Variability's $6.99. TYDE Study also leads on update cadence (every 2 weeks vs every 2 months). Camera Heart Rate Variability's advantage is iOS requirement (12.0 vs 16.0). On ads, in-app purchases and device support there is nothing between them.

TYDE Study is free to download; Camera Heart Rate Variability costs $6.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Camera Heart Rate Variability ships an update every 2 months, TYDE Study every 2 weeks. The most recent releases landed on October 1, 2026 and September 10, 2026 respectively.

## The numbers

| Metric | Camera Heart Rate Variability | TYDE Study |
| --- | --- | --- |
| Price | $6.99 | **Free** |
| Rating | **[2.8 (8 ratings)](https://appshunter.io/ios/app/camera-heart-rate-variability/id788460316/reviews)** | — |
| Number of ratings | **8** | — |
| Positive reviews | 27.8% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 2 weeks** |
| Monetization | Free | — |
| Size | 32 MB | 52 MB |
| Requires iOS | **12.0** | 16.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [A.S.M.A. B.V.](https://appshunter.io/developer/1066843463) | [Avicenna Research Inc.](https://appshunter.io/developer/1137173051) |

## What reviewers say

### Camera Heart Rate Variability

[App page](https://appshunter.io/ios/app/camera-heart-rate-variability/id788460316)

Measure heart rate variability using your phone's camera without external devices. Analyze time and frequency domain features to understand cardiac autonomic regulation, stress levels, and training impact.

**Highlights:** Record and plot HRV data, Extract time and frequency domain features, No heart rate monitor required, Configurable time window for analysis, Automatic RR-interval correction, Event annotation and comparison, Data export to iTunes and Dropbox

**Features:** Vision Pro support

**In-app purchases:** none


### TYDE Study

[App page](https://appshunter.io/ios/app/tyde-study/id6749776418)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Camera Heart Rate Variability free?

Camera Heart Rate Variability costs $6.99, with no in-app purchases.

### Is TYDE Study free?

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

### Do Camera Heart Rate Variability or TYDE Study have ads?

Neither Camera Heart Rate Variability nor TYDE Study shows ads.

### Which is updated more often, Camera Heart Rate Variability or TYDE Study?

Camera Heart Rate Variability ships an update every 2 months, and TYDE Study every 2 weeks. Most recently, Camera Heart Rate Variability was updated on October 1, 2026 and TYDE Study on September 10, 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.*