# Gainz tracking vs Biohack Harmonic

The clearest difference is price: Gainz tracking at Free against Biohack Harmonic's $3.99. Biohack Harmonic's advantage is iOS requirement (13.0 vs 17.0). On in-app purchases there is nothing between them.

Gainz tracking is free to download; Biohack Harmonic costs $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

## The numbers

| Metric | Gainz tracking | Biohack Harmonic |
| --- | --- | --- |
| Price | **Free** | $3.99 |
| In-app purchases | No | No |
| Ads | No | — |
| Update frequency | Every 2 days | — |
| Size | 49 MB | 17 MB |
| Requires iOS | 17.0 | **13.0** |
| Devices | **iPhone** | — |
| Age rating | 4+ | 4+ |
| Developer | [Wesley Bosman](https://appshunter.io/developer/1564880874) | [Heartbeat Frequencies LLC](https://appshunter.io/developer/1636719046) |

## What reviewers say

### Gainz tracking

[App page](https://appshunter.io/ios/app/gainz-tracking/id1564880872)

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

**In-app purchases:** none


### Biohack Harmonic

[App page](https://appshunter.io/ios/app/biohack-harmonic/id6760415383)

**In-app purchases:** none


## Frequently asked questions

### Is Gainz tracking free?

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

### Is Biohack Harmonic free?

Biohack Harmonic costs $3.99, with no in-app purchases.

---

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