# Crown Centrex vs autotwin

The clearest difference is update cadence: autotwin at fortnightly against Crown Centrex's every 6 months. Crown Centrex's advantage is iOS requirement (13.0 vs 15.1). 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.

Crown Centrex ships an update every 6 months, autotwin fortnightly. The most recent releases landed on October 6, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | Crown Centrex | autotwin |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 months | **Fortnightly** |
| Monetization | Free | — |
| Size | 32 MB | 65 MB |
| Requires iOS | **13.0** | 15.1 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Gamma Communications GmbH](https://appshunter.io/developer/1500711306) | [VISI/ONE GmbH](https://appshunter.io/developer/1181334530) |

## What reviewers say

### 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


### autotwin

[App page](https://appshunter.io/ios/app/autotwin/id6736519305)

**In-app purchases:** none


## Frequently asked questions

### Is Crown Centrex free?

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

### Is autotwin free?

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

### Do Crown Centrex or autotwin have ads?

Neither Crown Centrex nor autotwin shows ads.

### Which is updated more often, Crown Centrex or autotwin?

Crown Centrex ships an update every 6 months, and autotwin fortnightly. Most recently, Crown Centrex was updated on October 6, 2026 and autotwin on October 9, 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.*