# Zooniverse vs BioStrength

The clearest difference is update cadence: BioStrength at weekly against Zooniverse's every 2 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.

Zooniverse ships an update every 2 months, BioStrength weekly. The most recent releases landed on November 2, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Zooniverse | BioStrength |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.7 (38 ratings)](https://appshunter.io/ios/app/zooniverse/id1194130243/reviews)** | — |
| Number of ratings | **38** | — |
| Positive reviews | 58.8% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Weekly** |
| Monetization | Free | — |
| Size | 50 MB | 46 MB |
| Requires iOS | 15.1 | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Zooniverse](https://appshunter.io/developer/1851894671) | [The Members](https://appshunter.io/developer/1653824858) |

## What reviewers say

### Zooniverse

[App page](https://appshunter.io/ios/app/zooniverse/id1194130243)

Participate in real scientific research by classifying data for projects across various disciplines. Contribute to discoveries and datasets that advance knowledge, all from your mobile device. This platform connects volunteers with professional researchers for impactful citizen science.

**Highlights:** People-powered research platform, Volunteer opportunities, Access to mobile-friendly projects, Push notification updates, View publications, Contribute to scientific discoveries

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

**In-app purchases:** none


### BioStrength

[App page](https://appshunter.io/ios/app/biostrength/id6748039392)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Zooniverse free?

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

### Is BioStrength free?

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

### Do Zooniverse or BioStrength have ads?

Neither Zooniverse nor BioStrength shows ads.

### Which is updated more often, Zooniverse or BioStrength?

Zooniverse ships an update every 2 months, and BioStrength weekly. Most recently, Zooniverse was updated on November 2, 2026 and BioStrength on October 30, 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.*