# grommunio chat vs Crown Centrex

The clearest difference is update cadence: grommunio chat at every 3 months against Crown Centrex's every 6 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.

grommunio chat ships an update every 3 months, Crown Centrex every 6 months. The most recent releases landed on September 22, 2026 and August 23, 2026 respectively.

## The numbers

| Metric | grommunio chat | Crown Centrex |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 6 months |
| Monetization | — | Free |
| Size | 65 MB | 32 MB |
| Requires iOS | **12.4** | 13.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [grommunio GmbH](https://appshunter.io/developer/1582191992) | [Gamma Communications GmbH](https://appshunter.io/developer/1500711306) |

## What reviewers say

### grommunio chat

[App page](https://appshunter.io/ios/app/grommunio-chat/id1582191990)

**Features:** macOS Compatibility

**In-app purchases:** none


### Crown Centrex

[App page](https://appshunter.io/ios/app/crown-centrex/id1611135719)

Transform your smartphone into a mobile extension of your virtual PBX. Make and receive calls worldwide using your landline number for cost-efficient and mobile communication. Access all the features of your Gamma Cloud PBX system directly from your device.

**Highlights:** Smartphone as mobile PBX extension, Worldwide calls with landline number, Cost-efficient mobile calling, Access to PBX features, Gamma Cloud PBX integration

**Features:** Siri integration, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is grommunio chat free?

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

### Is Crown Centrex free?

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

### Do grommunio chat or Crown Centrex have ads?

Neither grommunio chat nor Crown Centrex shows ads.

### Which is updated more often, grommunio chat or Crown Centrex?

grommunio chat ships an update every 3 months, and Crown Centrex every 6 months. Most recently, grommunio chat was updated on September 22, 2026 and Crown Centrex on August 23, 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.*