# TMR Wireless Siren vs Birsav

The clearest difference is ads: TMR Wireless Siren at none against Birsav's shown. TMR Wireless Siren also leads on iOS requirement (12.0 vs 15.1). Birsav's advantage is update cadence (every 2 days vs monthly). On price, 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.

TMR Wireless Siren ships an update monthly, Birsav every 2 days. The most recent releases landed on November 4, 2026 and November 8, 2026 respectively.

## The numbers

| Metric | TMR Wireless Siren | Birsav |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Monthly | **Every 2 days** |
| Size | 32 MB | 47 MB |
| Requires iOS | **12.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [TMR GRUP ELEKTRONIK OTOMOTIV DIS TICARET ANONIM SIRKETI](https://appshunter.io/developer/1776585801) | [birsav bilisim sanayi ve ticaret limited sirketi](https://appshunter.io/developer/1873279333) |

## What reviewers say

### TMR Wireless Siren

[App page](https://appshunter.io/ios/app/tmr-wireless-siren/id6737474205)

**In-app purchases:** none


### Birsav

[App page](https://appshunter.io/ios/app/birsav/id6747433107)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is TMR Wireless Siren free?

TMR Wireless Siren is free to download, with no in-app purchases.

### Is Birsav free?

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

### Do TMR Wireless Siren or Birsav have ads?

Birsav shows ads; TMR Wireless Siren does not.

### Which is updated more often, TMR Wireless Siren or Birsav?

TMR Wireless Siren ships an update monthly, and Birsav every 2 days. Most recently, TMR Wireless Siren was updated on November 4, 2026 and Birsav on November 8, 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.*