# Onyx IX CSS vs Zero100 Members

The clearest difference is update cadence: Zero100 Members at every 6 weeks against Onyx IX CSS's every 4 months. Onyx IX CSS's advantage is iOS requirement (13.0 vs 16.0). 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.

Onyx IX CSS ships an update every 4 months, Zero100 Members every 6 weeks. Both last shipped on October 6, 2026.

## The numbers

| Metric | Onyx IX CSS | Zero100 Members |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 6 weeks** |
| Size | 27 MB | 35 MB |
| Requires iOS | **13.0** | 16.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Ultimate Solutions](https://appshunter.io/developer/1190319655) | [Z100 Community Limited](https://appshunter.io/developer/1626289953) |

## What reviewers say

### Onyx IX CSS

[App page](https://appshunter.io/ios/app/onyx-ix-css/id1584092874)

**Features:** macOS Compatibility

**In-app purchases:** none


### Zero100 Members

[App page](https://appshunter.io/ios/app/zero100-members/id6742142910)

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

**In-app purchases:** none


## Frequently asked questions

### Is Onyx IX CSS free?

Onyx IX CSS is free to download, with no in-app purchases.

### Is Zero100 Members free?

Zero100 Members is free to download, with no in-app purchases.

### Do Onyx IX CSS or Zero100 Members have ads?

Neither Onyx IX CSS nor Zero100 Members shows ads.

### Which is updated more often, Onyx IX CSS or Zero100 Members?

Onyx IX CSS ships an update every 4 months, and Zero100 Members every 6 weeks. Most recently, Onyx IX CSS was updated on October 6, 2026 and Zero100 Members on October 6, 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.*