# eCAT Viewer vs CD Express

The clearest difference is update cadence: CD Express at fortnightly against eCAT Viewer's every 4 months. eCAT Viewer's advantage is iOS requirement (8.0 vs 16.6). 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.

eCAT Viewer ships an update every 4 months, CD Express fortnightly. The most recent releases landed on October 6, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | eCAT Viewer | CD Express |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[3.0 (2 ratings)](https://appshunter.io/ios/app/cd-express/id1514425126/reviews)** |
| Number of ratings | — | **2** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Fortnightly** |
| Monetization | — | Free |
| Size | 23 MB | 468 MB |
| Requires iOS | **8.0** | 16.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 17+ | 4+ |
| Developer | [CADENAS Konstruktions-, Softwareentwicklungs- und Vertriebs GmbH](https://appshunter.io/developer/522705057) | [Express Unlimited Technologies Operating Corp.](https://appshunter.io/developer/1514425125) |

## What reviewers say

### eCAT Viewer

[App page](https://appshunter.io/ios/app/ecat-viewer/id618373453)

**Features:** macOS Compatibility

**In-app purchases:** none


### CD Express

[App page](https://appshunter.io/ios/app/cd-express/id1514425126)

This business communication app offers secure team collaboration with features like encrypted chats, group discussions, and file sharing. It enables instant communication with colleagues, partners, and clients, ensuring data privacy and compliance.

**Highlights:** Encrypted team chats, Group discussions and channels, File sharing, Voice and video conferencing, Contact directory, Active Directory integration, Bot integrations

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

**In-app purchases:** none


## Frequently asked questions

### Is eCAT Viewer free?

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

### Is CD Express free?

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

### Do eCAT Viewer or CD Express have ads?

Neither eCAT Viewer nor CD Express shows ads.

### Which is updated more often, eCAT Viewer or CD Express?

eCAT Viewer ships an update every 4 months, and CD Express fortnightly. Most recently, eCAT Viewer was updated on October 6, 2026 and CD Express on October 15, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*