# X Stollberg vs Kosmos Lab

The clearest difference is iOS requirement: X Stollberg at 12.0 against Kosmos Lab'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.

X Stollberg ships an update weekly, Kosmos Lab every 4 days. The most recent releases landed on November 5, 2026 and November 6, 2026 respectively.

## The numbers

| Metric | X Stollberg | Kosmos Lab |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Weekly | **Every 4 days** |
| Size | 129 MB | 40 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 17+ | 17+ |
| Developer | [GBG GmbH](https://appshunter.io/developer/6790759663) | [Zentrum für künstlerische Forschung e.V.](https://appshunter.io/developer/6796385621) |

## What reviewers say

### X Stollberg

[App page](https://appshunter.io/ios/app/x-stollberg/id6790759661)

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

**In-app purchases:** none


### Kosmos Lab

[App page](https://appshunter.io/ios/app/kosmos-lab/id6796385619)

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

**In-app purchases:** none


## Frequently asked questions

### Is X Stollberg free?

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

### Is Kosmos Lab free?

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

### Do X Stollberg or Kosmos Lab have ads?

Neither X Stollberg nor Kosmos Lab shows ads.

### Which is updated more often, X Stollberg or Kosmos Lab?

X Stollberg ships an update weekly, and Kosmos Lab every 4 days. Most recently, X Stollberg was updated on November 5, 2026 and Kosmos Lab on November 6, 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.*