# KATWARN vs Marzhausen

The clearest difference is update cadence: KATWARN at every 4 months against Marzhausen's every 26 months. KATWARN also leads on iOS requirement (13.0 vs 15). 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.

KATWARN ships an update every 4 months, Marzhausen every 26 months. The most recent releases landed on November 1, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | KATWARN | Marzhausen |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.3 (3 ratings)](https://appshunter.io/ios/app/katwarn/id566560753/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 4 months** | Every 26 months |
| Monetization | Free | — |
| Size | 5 MB | 11 MB |
| Requires iOS | **13.0** | 15 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [CombiRisk - Riskmanagement GmbH](https://appshunter.io/developer/566560756) | [Verbandsgemeinde Hachenburg](https://appshunter.io/developer/1625636202) |

## What reviewers say

### KATWARN

[App page](https://appshunter.io/ios/app/katwarn/id566560753)

Receive location-based alerts for dangers and disasters across Germany. Get notified about major fires, extreme weather, and other critical events for your current location and up to seven additional chosen areas. The app uses energy-efficient location services to minimize battery drain.

**Highlights:** Location-based alerts for up to 8 locations, Zip code precise warnings, Color-coded warning levels, Energy-efficient battery usage, Real-time danger area notifications, Feedback function

**Features:** Vision Pro support

**In-app purchases:** none


### Marzhausen

[App page](https://appshunter.io/ios/app/marzhausen/id1626982545)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is KATWARN free?

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

### Is Marzhausen free?

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

### Do KATWARN or Marzhausen have ads?

Neither KATWARN nor Marzhausen shows ads.

### Which is updated more often, KATWARN or Marzhausen?

KATWARN ships an update every 4 months, and Marzhausen every 26 months. Most recently, KATWARN was updated on November 1, 2026 and Marzhausen on October 27, 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.*