# CST ESS vs Arhivix

The clearest difference is update cadence: Arhivix at weekly against CST ESS's every 29 months. Arhivix also leads on device support. On price, in-app purchases and iOS requirement there is nothing between them.

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

CST ESS ships an update every 29 months, Arhivix weekly. The most recent releases landed on September 14, 2026 and September 17, 2026 respectively.

## The numbers

| Metric | CST ESS | Arhivix |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | — | No |
| Update frequency | Every 29 months | **Weekly** |
| Size | 37 MB | 121 MB |
| Requires iOS | **15.6** | 16.0 |
| Devices | — | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [无锡乐伏网络科技有限公司](https://appshunter.io/developer/1197246083) | [NOTIX DOO](https://appshunter.io/developer/1749586896) |

## What reviewers say

### CST ESS

[App page](https://appshunter.io/ios/app/cst-ess/id6447654088)

**In-app purchases:** none


### Arhivix

[App page](https://appshunter.io/ios/app/arhivix/id6686405015)

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

**In-app purchases:** none


## Frequently asked questions

### Is CST ESS free?

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

### Is Arhivix free?

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

### Which is updated more often, CST ESS or Arhivix?

CST ESS ships an update every 29 months, and Arhivix weekly. Most recently, CST ESS was updated on September 14, 2026 and Arhivix on September 17, 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.*