# İBB KareKod vs Düdüğüm

The clearest difference is update cadence: Düdüğüm at every 6 weeks against İBB KareKod's every 12 months. İBB KareKod's advantage is review sentiment (100% vs 86%) and iOS requirement (10.0 vs 15.6). 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.

İBB KareKod ships an update every 12 months, Düdüğüm every 6 weeks. The most recent releases landed on October 20, 2026 and October 23, 2026 respectively.

## The numbers

| Metric | İBB KareKod | Düdüğüm |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.7 (3 ratings)](https://appshunter.io/ios/app/dudugum/id1538329721/reviews)** |
| Number of ratings | — | **3** |
| Positive reviews | **100.0% of reviews** | 86.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 12 months | **Every 6 weeks** |
| Monetization | Free | Free |
| Size | 35 MB | 25 MB |
| Requires iOS | **10.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Istanbul Büyükşehir Belediye Başkanlığı](https://appshunter.io/developer/472272208) | [HDS OTOMASYON GUVENLIK VE YAZILIM TEKNOLOJILERI SANAYI TICARET LIMITED SIRKETI](https://appshunter.io/developer/1523706871) |

## What reviewers say

### İBB KareKod

[App page](https://appshunter.io/ios/app/ibb-karekod/id1081744575)

This utility app allows users to quickly access information and features about services by scanning QR codes with their mobile devices. It facilitates faster and more practical access to details, acting as an efficient tool for information sharing.

**Highlights:** QR code scanning, Access service information, Fast and practical information retrieval, Mobile device integration

**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 İBB KareKod free?

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

### Is Düdüğüm free?

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

### Do İBB KareKod or Düdüğüm have ads?

Neither İBB KareKod nor Düdüğüm shows ads.

### Which is updated more often, İBB KareKod or Düdüğüm?

İBB KareKod ships an update every 12 months, and Düdüğüm every 6 weeks. Most recently, İBB KareKod was updated on October 20, 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.*