Fixed Line vs Crown Centrex
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Fixed Line
Transform your smartphone into a mobile extension of your virtual PBX. Make and receive calls worldwide using your landline number, accessing all your PBX features on the go. This app requires an active Fixed Line System account to function.
- Mobile PBX extension
- Worldwide landline calls
- Account management
- Full telephony features
- Contact list integration
- Call journal
- Team view & presence
- Chat and group chat
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The mobile fixed line is a modern communication service from the pioneer and technology leader in the field of unified communication - UNICOPE. 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 with UNICOPE. Take advantage of the functions of your PBX and all the features of Fixed Line. ++ Note: The Fixed Line-app only works in combination with an active account on the Fixed Line System. ++ TOP-Features: Account management - Accounts are automatically created by autoprovisioning - Add, edit and delete accounts All telephony features - Answer, hang up, consultation, hold, transfer, and connect - Phone-conference - Dial by number - Dial from contact list - Dial from call journal - Dial from team view - Dial from chat - Dial with Mobile Network (GSM) - Call mute, switch to speaker - Call signaling by sound and vibration - Number resolution incl. contact image from local contacts - Number resolution from PBX contacts Contact list - Displaying local contacts - Call and email from contact details - Access to server address book - search function Call journal - Display all calls (combined with landline) - Contacts resolution - Call and contact details - Filter for all or only missed calls Team View - Favorites - All employees sorted by departments - call option in detail-view - possibility to send e-mails Messages (Chat) - Conversation overview - Send and receive chat messages - Group Chat Presence - See the presence of all your colleagues General - Copy-Feature for almost data - Diverse DND Modes - GSM Mode - Callthrough-Mode
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 review sentiment: Fixed Line at 40% against Crown Centrex's 0%. Fixed Line also leads on update cadence (every 2 months vs every 6 months). On price, ads, in-app purchases and monetization model 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.
Fixed Line ships an update every 2 months, Crown Centrex every 6 months. The most recent releases landed on June 24, 2026 and August 23, 2026 respectively.
| Parameter | Fixed Line | Crown Centrex |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | — |
| Positive reviews | 40.0% of reviews — better | 0.0% of reviews |
| Number of ratings | 1 — better | — |
| Update frequency | Every 2 months — better | Every 6 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPod | iPhone, iPod |
| Requires iOS | 13.0 | 13.0 |
| Further details — not scored | ||
| Size | 34 MB | 32 MB |
| Age rating | 4+ | 4+ |
| Developer | UNICOPE GmbH | Gamma Communications GmbH |
Customer experience
Fixed Line
Crown Centrex
In-app purchases
Fixed Line
No in-app purchases
Crown Centrex
No in-app purchases









