# HAYDİ vs Düdüğüm

The clearest difference is update cadence: Düdüğüm at every 6 weeks against HAYDİ's every 11 months. HAYDİ's advantage is iOS requirement (13.0 vs 15.6). 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.

HAYDİ ships an update every 11 months, Düdüğüm every 6 weeks. The most recent releases landed on October 2, 2026 and October 23, 2026 respectively.

## The numbers

| Metric | HAYDİ | Düdüğüm |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.7 (3 ratings)](https://appshunter.io/ios/app/dudugum/id1538329721/reviews)** |
| Number of ratings | — | **3** |
| Positive reviews | — | 86.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 11 months | **Every 6 weeks** |
| Monetization | — | Free |
| Size | 6 MB | 25 MB |
| Requires iOS | **13.0** | 15.6 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Emniyet Genel Müdürlüğü](https://appshunter.io/developer/702817203) | [HDS OTOMASYON GUVENLIK VE YAZILIM TEKNOLOJILERI SANAYI TICARET LIMITED SIRKETI](https://appshunter.io/developer/1523706871) |

## What reviewers say

### HAYDİ

[App page](https://appshunter.io/ios/app/haydi/id1524498391)

**Features:** macOS Compatibility

**In-app purchases:** none


### Düdüğüm

[App page](https://appshunter.io/ios/app/dudugum/id1538329721)

This app generates a whistle sound to signal your location in emergencies or when trapped. It can also send an SMS to pre-selected contacts to inform them of your safety status. The application is free and ad-free, developed for humanitarian purposes.

**Highlights:** Generates whistle sound, Sends location SMS, Pre-set contact alerts, Ad-free experience, Humanitarian purpose

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is HAYDİ free?

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

### Is Düdüğüm free?

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

### Do HAYDİ or Düdüğüm have ads?

Neither HAYDİ nor Düdüğüm shows ads.

### Which is updated more often, HAYDİ or Düdüğüm?

HAYDİ ships an update every 11 months, and Düdüğüm every 6 weeks. Most recently, HAYDİ was updated on October 2, 2026 and Düdüğüm on October 23, 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.*