# Emitter vs Crown Centrex

The clearest difference is review sentiment: Emitter at 100% against Crown Centrex's 0%. Emitter also leads on update cadence (every 5 days vs every 6 months). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Emitter ships an update every 5 days, Crown Centrex every 6 months. The most recent releases landed on September 14, 2026 and September 19, 2026 respectively.

## The numbers

| Metric | Emitter | Crown Centrex |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | **100.0% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 5 days** | Every 6 months |
| Monetization | Free | Free |
| Size | 100 MB | 32 MB |
| Requires iOS | 14.0 | **13.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Futura GmbH](https://appshunter.io/developer/1176902285) | [Gamma Communications GmbH](https://appshunter.io/developer/1500711306) |

## What reviewers say

### Emitter

[App page](https://appshunter.io/ios/app/emitter/id1176902286)

Connect your pest control operations to the Internet of Things. Manage sensors, traps, and cameras remotely for 24/7 monitoring and instant alerts. Ideal for businesses of all sizes to digitize pest management.

**Highlights:** IoT connectivity for pest control, Remote sensor, trap, and camera management, 24/7 monitoring and instant alerts, QR code trap creation, Multi-account business management, End-customer limited access logins, Support for various trap and pest types

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

**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 Emitter free?

Emitter 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 Emitter or Crown Centrex have ads?

Neither Emitter nor Crown Centrex shows ads.

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

Emitter ships an update every 5 days, and Crown Centrex every 6 months. Most recently, Emitter was updated on September 14, 2026 and Crown Centrex on September 19, 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.*