# Klaus vs Aufsteirern

The clearest difference is iOS requirement: Klaus at 12.0 against Aufsteirern's 15.0. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Klaus ships an update monthly, Aufsteirern every 2 months. The most recent releases landed on October 25, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | Klaus | Aufsteirern |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Monthly** | Every 2 months |
| Size | 32 MB | 89 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Markus Stradner](https://appshunter.io/developer/1884693633) | [Ivents Kulturagentur Lientscher und Perna GmbH](https://appshunter.io/developer/6775984104) |

## What reviewers say

### Klaus

[App page](https://appshunter.io/ios/app/klaus-die-hackbrett-maus/id6760487536)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### Aufsteirern

[App page](https://appshunter.io/ios/app/aufsteirern/id6775984102)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Klaus free?

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

### Is Aufsteirern free?

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

### Do Klaus or Aufsteirern have ads?

Neither Klaus nor Aufsteirern shows ads.

### Which is updated more often, Klaus or Aufsteirern?

Klaus ships an update monthly, and Aufsteirern every 2 months. Most recently, Klaus was updated on October 25, 2026 and Aufsteirern on October 12, 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.*