# Kosmos vs Stollfuß E

The clearest difference is iOS requirement: Kosmos at 12.2 against Stollfuß E's 16.0. 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.

Kosmos ships an update every 6 months, Stollfuß E every 3 months. The most recent releases landed on October 11, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | Kosmos | Stollfuß E |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (6 ratings)](https://appshunter.io/ios/app/kosmos-plus/id1064921271/reviews)** | — |
| Number of ratings | **6** | — |
| Positive reviews | 16.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 3 months** |
| Monetization | Free | — |
| Size | 3 MB | 18 MB |
| Requires iOS | **12.2** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Franckh-Kosmos Verlags GmbH & Co. KG](https://appshunter.io/developer/375309682) | [Lefebvre Sarrut GmbH](https://appshunter.io/developer/1657364987) |

## What reviewers say

### Kosmos

[App page](https://appshunter.io/ios/app/kosmos-plus/id1064921271)

Enhance your reading experience with digital content like videos, audio, and images linked to specific books. Unlock exclusive multimedia materials by entering a code or answering a question from your book. Stream or download content for offline access.

**Highlights:** Access digital book content, Unlock videos, audio, and images, Use book code or answer questions, Stream or download content, Offline access, Organized media lists, Search functionality

**Features:** Vision Pro support

**In-app purchases:** none


### Stollfuß E

[App page](https://appshunter.io/ios/app/stollfu-e-library/id6444852908)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Kosmos free?

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

### Is Stollfuß E free?

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

### Do Kosmos or Stollfuß E have ads?

Neither Kosmos nor Stollfuß E shows ads.

### Which is updated more often, Kosmos or Stollfuß E?

Kosmos ships an update every 6 months, and Stollfuß E every 3 months. Most recently, Kosmos was updated on October 11, 2026 and Stollfuß E on October 4, 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.*