# BeatFlow S4F vs Heart Rate Variability +

The clearest difference is in-app purchases: BeatFlow S4F at none against Heart Rate Variability +'s 5. BeatFlow S4F also leads on iOS requirement (12.0 vs 16.0). On price, ads and device support there is nothing between them.

Both are free to download. Heart Rate Variability + sells 5 in-app purchases, starting at $4.99 per 7 days. BeatFlow S4F asks for nothing beyond the download.

## The numbers

| Metric | BeatFlow S4F | Heart Rate Variability + |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | — | Every 4 months |
| Size | 32 MB | 54 MB |
| Requires iOS | **12.0** | 16.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [NISSATECH INNOVATION CENTRE DOO NIS](https://appshunter.io/developer/1489586906) | [MD SOFTWARE SERVICES LTD](https://appshunter.io/developer/1843392499) |

## What reviewers say

### BeatFlow S4F

[App page](https://appshunter.io/ios/app/beatflow-s4f/id6471108195)

**Features:** macOS Compatibility

**In-app purchases:** none


### Heart Rate Variability +

[App page](https://appshunter.io/ios/app/heart-rate-variability-plus/id6753306246)

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly | $4.99 | per 7 days |
| Weekly-Trial | $4.99 | per 7 days |
| Monthly | $12.99 | per month |
| Yearly | $39.99 | per year |
| Lifetime | $59.99 | one-time |


## Frequently asked questions

### Is BeatFlow S4F free?

BeatFlow S4F is free to download, with no in-app purchases.

### Is Heart Rate Variability + free?

Heart Rate Variability + is free to download, with in-app purchases available.

### Do BeatFlow S4F or Heart Rate Variability + have ads?

Neither BeatFlow S4F nor Heart Rate Variability + 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.*