# Heart Rate Variability Logger vs TanitaSync

The clearest difference is price: TanitaSync at $4.99 against Heart Rate Variability Logger's $9.99. Heart Rate Variability Logger's advantage is chart position (#97 vs unranked) and iOS requirement (15.6 vs 18.0). On ads, in-app purchases and device support there is nothing between them.

Heart Rate Variability Logger costs $9.99 and TanitaSync $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

## The numbers

| Metric | Heart Rate Variability Logger | TanitaSync |
| --- | --- | --- |
| Price | $9.99 | **$4.99** |
| Rating | **[3.5 (19 ratings)](https://appshunter.io/ios/app/heart-rate-variability-logger/id683984776/reviews)** | — |
| Number of ratings | **19** | — |
| Positive reviews | 43.1% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Fortnightly | — |
| Monetization | Paid | — |
| Best chart rank | **#97** | — |
| Size | 10 MB | 2 MB |
| Requires iOS | **15.6** | 18.0 |
| Devices | **iPhone, iPod, Apple Watch** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [A.S.M.A. B.V.](https://appshunter.io/developer/1066843463) | [Klemen Mercun](https://appshunter.io/developer/1873708676) |

## What reviewers say

### Heart Rate Variability Logger

[App page](https://appshunter.io/ios/app/heart-rate-variability-logger/id683984776)

**Currently charting:** #97 Top Paid · Health & Fitness (US App Store)

This app records, plots, and exports heart rate variability data, including time, frequency, and non-linear features. It supports experience sampling, RR-interval correction, and activity/location tracking. Requires a compatible Bluetooth heart rate sensor.

**Highlights:** Record and plot HRV data, Extract time and frequency domain features, Experience sampling for event annotation, Compare multiple recordings, Activity and location tracking, RR-interval correction, Export data for Kubios

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

**In-app purchases:** none


### TanitaSync

[App page](https://appshunter.io/ios/app/tanitasync/id6758568595)

**In-app purchases:** none


## Frequently asked questions

### Is Heart Rate Variability Logger free?

Heart Rate Variability Logger costs $9.99, with no in-app purchases.

### Is TanitaSync free?

TanitaSync costs $4.99, with no in-app purchases.

### Do Heart Rate Variability Logger or TanitaSync have ads?

Neither Heart Rate Variability Logger nor TanitaSync shows ads.

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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.*