# Headgrower vs Biobest

The clearest difference is update cadence: Biobest at every 3 weeks against Headgrower's every 3 months. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Headgrower ships an update every 3 months, Biobest every 3 weeks. The most recent releases landed on November 2, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Headgrower | Biobest |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 3 weeks** |
| Size | 68 MB | 23 MB |
| Requires iOS | **15.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [BARTLETT INSTRUMENT CO.](https://appshunter.io/developer/1222799768) | [Biobestgroup](https://appshunter.io/developer/1708892726) |

## What reviewers say

### Headgrower

[App page](https://appshunter.io/ios/app/headgrower/id1445448736)

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

**In-app purchases:** none


### Biobest

[App page](https://appshunter.io/ios/app/biobest-side-effects-app/id6467640637)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Headgrower free?

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

### Is Biobest free?

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

### Do Headgrower or Biobest have ads?

Neither Headgrower nor Biobest shows ads.

### Which is updated more often, Headgrower or Biobest?

Headgrower ships an update every 3 months, and Biobest every 3 weeks. Most recently, Headgrower was updated on November 2, 2026 and Biobest 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.*