# REX Centrum bezpečí vs Hello Emma

The clearest difference is price: REX Centrum bezpečí at Free against Hello Emma's $9.99. REX Centrum bezpečí also leads on iOS requirement (11.0 vs 16.0). On update cadence, ads, in-app purchases and device support there is nothing between them.

REX Centrum bezpečí is free to download; Hello Emma costs $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Both ship on a similar rhythm, roughly every 3 months. The most recent releases landed on June 5, 2026 and July 6, 2026 respectively.

## The numbers

| Metric | REX Centrum bezpečí | Hello Emma |
| --- | --- | --- |
| Price | **Free** | $9.99 |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/hello-emma/id6449221397/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | 80.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | Every 3 months |
| Monetization | **Free** | Paid |
| Size | 19 MB | 9 MB |
| Requires iOS | **11.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, Apple Watch |
| Age rating | 4+ | 17+ |
| Developer | [1. REX SERVICES, a.s.](https://appshunter.io/developer/1084232045) | [David Beck](https://appshunter.io/developer/1688173002) |

## What reviewers say

### REX Centrum bezpečí

[App page](https://appshunter.io/ios/app/rex-centrum-bezpeci/id1530005571)

Manage all your REX devices from a single mobile application. Control security systems, track vehicles and pets, and view event history. Sign in with your REX account to access all features.

**Highlights:** Arm and disarm controls, Map view, Logbook and event history, Device and contact settings, Billing and payment, Support for various REX devices

**Features:** macOS Compatibility

**In-app purchases:** none


### Hello Emma

[App page](https://appshunter.io/ios/app/hello-emma/id6449221397)

This voice assistant supports Czech, Slovak, Polish, and English. It allows users to perform various tasks using voice commands, including sending messages, managing calendars, and controlling smart home devices via custom shortcuts. Additional features include a calculator, radio, and dictation for navigation apps.

**Highlights:** Voice commands in multiple languages, SMS dictation, Calendar and reminder management, Smart home control via Shortcuts, Speaking calculator, Navigation dictation

**In-app purchases:** none


## Frequently asked questions

### Is REX Centrum bezpečí free?

REX Centrum bezpečí is free to download, with no in-app purchases.

### Is Hello Emma free?

Hello Emma costs $9.99, with no in-app purchases.

### Do REX Centrum bezpečí or Hello Emma have ads?

Neither REX Centrum bezpečí nor Hello Emma shows ads.

### Which is updated more often, REX Centrum bezpečí or Hello Emma?

REX Centrum bezpečí ships an update every 3 months, and Hello Emma every 3 months. Most recently, REX Centrum bezpečí was updated on June 5, 2026 and Hello Emma on July 6, 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.*