# Horizon RSA vs Comtel Sirens

The clearest difference is update cadence: Comtel Sirens at every 2 days against Horizon RSA's every 41 months. 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.

Horizon RSA ships an update every 41 months, Comtel Sirens every 2 days. The most recent releases landed on May 17, 2026 and September 12, 2026 respectively.

## The numbers

| Metric | Horizon RSA | Comtel Sirens |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 41 months | **Every 2 days** |
| Size | 20 MB | 67 MB |
| Requires iOS | **12.4** | 13.4 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 17+ | 4+ |
| Developer | [HORIZON INSURANCE CO. S.A](https://appshunter.io/developer/1619085805) | [ProgressNet](https://appshunter.io/developer/1509775083) |

## What reviewers say

### Horizon RSA

[App page](https://appshunter.io/ios/app/horizon-rsa/id1619085803)

**Features:** macOS Compatibility

**In-app purchases:** none


### Comtel Sirens

[App page](https://appshunter.io/ios/app/comtel-sirens/id6739497084)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Horizon RSA free?

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

### Is Comtel Sirens free?

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

### Do Horizon RSA or Comtel Sirens have ads?

Neither Horizon RSA nor Comtel Sirens shows ads.

### Which is updated more often, Horizon RSA or Comtel Sirens?

Horizon RSA ships an update every 41 months, and Comtel Sirens every 2 days. Most recently, Horizon RSA was updated on May 17, 2026 and Comtel Sirens on September 12, 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.*