# Hattert vs Undenheim

The clearest difference is update cadence: Undenheim at every 15 months against Hattert's every 52 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.

Hattert ships an update every 52 months, Undenheim every 15 months. The most recent releases landed on October 4, 2026 and September 29, 2026 respectively.

## The numbers

| Metric | Hattert | Undenheim |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 52 months | **Every 15 months** |
| Size | 13 MB | 7 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Verbandsgemeinde Hachenburg](https://appshunter.io/developer/1625636202) | [apicodo GmbH](https://appshunter.io/developer/1169099711) |

## What reviewers say

### Hattert

[App page](https://appshunter.io/ios/app/hattert/id1626091084)

**Features:** Vision Pro support

**In-app purchases:** none


### Undenheim

[App page](https://appshunter.io/ios/app/undenheim/id6745123749)

**In-app purchases:** none


## Frequently asked questions

### Is Hattert free?

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

### Is Undenheim free?

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

### Do Hattert or Undenheim have ads?

Neither Hattert nor Undenheim shows ads.

### Which is updated more often, Hattert or Undenheim?

Hattert ships an update every 52 months, and Undenheim every 15 months. Most recently, Hattert was updated on October 4, 2026 and Undenheim on September 29, 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.*