# Onyx IX CSS vs Lotus Pro

The clearest difference is iOS requirement: Onyx IX CSS at 13.0 against Lotus Pro's 15.5. On price, update cadence, ads and in-app purchases 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, Lotus Pro every 8 months. The most recent releases landed on September 18, 2026 and September 9, 2026 respectively.

## The numbers

| Metric | Onyx IX CSS | Lotus Pro |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 4 months** | Every 8 months |
| Size | 27 MB | 50 MB |
| Requires iOS | **13.0** | 15.5 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Ultimate Solutions](https://appshunter.io/developer/1190319655) | [Sara Asloob](https://appshunter.io/developer/1701436578) |

## What reviewers say

### Onyx IX CSS

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

**Features:** macOS Compatibility

**In-app purchases:** none


### Lotus Pro

[App page](https://appshunter.io/ios/app/lotus-pro/id6463742489)

**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 Lotus Pro free?

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

### Do Onyx IX CSS or Lotus Pro have ads?

Neither Onyx IX CSS nor Lotus Pro shows ads.

### Which is updated more often, Onyx IX CSS or Lotus Pro?

Onyx IX CSS ships an update every 4 months, and Lotus Pro every 8 months. Most recently, Onyx IX CSS was updated on September 18, 2026 and Lotus Pro on September 9, 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.*