grommunio chat vs Crown Centrex
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
grommunio chat
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grommunio-chat is secure workplace for messaging your team. - Discuss topics in private groups, one-to-one or team-wide - View and share images To use this app, you need an URL for a grommunio-chat server.
Crown Centrex
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.
- Smartphone as mobile PBX extension
- Worldwide calls with landline number
- Cost-efficient mobile calling
- Access to PBX features
- Gamma Cloud PBX integration
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Crown cetrex is a modern communication serviceof Gamma. Get your telephone system to your phone. With this app you can use your smartphone as a mobile extension of your virtual PBX. Start and receive worldwide calls with your landline number so that you can telephone cost-efficient and mobile. Take advantage of the functions of your PBX and all the features of Gamma Cloud PBX
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | grommunio chat | Crown Centrex |
|---|---|---|
| Price | Free | Free |
| Positive reviews | — | 0.0% of reviews |
| Update frequency | Every 3 months — better | Every 6 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Free |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 12.4 — better | 13.0 |
| Further details — not scored | ||
| Size | 65 MB | 32 MB |
| Age rating | 4+ | 4+ |
| Developer | grommunio GmbH | Gamma Communications GmbH |
In-app purchases
grommunio chat
No in-app purchases
Crown Centrex
No in-app purchases
Questions
Is grommunio chat free?
Is Crown Centrex free?
Do grommunio chat or Crown Centrex have ads?
Which is updated more often, grommunio chat or Crown Centrex?
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