# Onyx IX CSS vs Busy Agent

The clearest difference is update cadence: Busy Agent at every 10 days against Onyx IX CSS's every 4 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.

Onyx IX CSS ships an update every 4 months, Busy Agent every 10 days. The most recent releases landed on November 3, 2026 and November 4, 2026 respectively.

## The numbers

| Metric | Onyx IX CSS | Busy Agent |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 10 days** |
| Size | 27 MB | 52 MB |
| Requires iOS | **13.0** | 13.4 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Ultimate Solutions](https://appshunter.io/developer/1190319655) | [DETAILS DIGITAL EST. FOR INFORMATION SYSTEMS TECHNOLOGY](https://appshunter.io/developer/1550654220) |

## What reviewers say

### Onyx IX CSS

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

**Features:** macOS Compatibility

**In-app purchases:** none


### Busy Agent

[App page](https://appshunter.io/ios/app/busy-agent/id6502257280)

**Features:** macOS Compatibility

**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 Busy Agent free?

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

### Do Onyx IX CSS or Busy Agent have ads?

Neither Onyx IX CSS nor Busy Agent shows ads.

### Which is updated more often, Onyx IX CSS or Busy Agent?

Onyx IX CSS ships an update every 4 months, and Busy Agent every 10 days. Most recently, Onyx IX CSS was updated on November 3, 2026 and Busy Agent on November 4, 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.*