# ISS Explorer vs Schüler

The clearest difference is price: ISS Explorer at Free against Schüler's $3.99. ISS Explorer also leads on update cadence (every 10 months vs every 22 months). Schüler's advantage is iOS requirement (11.0 vs 13.0). On ads, in-app purchases and device support there is nothing between them.

ISS Explorer is free to download; Schüler costs $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ISS Explorer ships an update every 10 months, Schüler every 22 months. The most recent releases landed on October 13, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | ISS Explorer | Schüler |
| --- | --- | --- |
| Price | **Free** | $3.99 |
| Rating | **[4.9 (16 ratings)](https://appshunter.io/ios/app/iss-explorer/id1429876038/reviews)** | — |
| Number of ratings | **16** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 10 months** | Every 22 months |
| Monetization | Free | — |
| Size | 747 MB | 7 MB |
| Requires iOS | 13.0 | **11.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [NASA](https://appshunter.io/developer/355542146) | [Avocado Software](https://appshunter.io/developer/503641340) |

## What reviewers say

### ISS Explorer

[App page](https://appshunter.io/ios/app/iss-explorer/id1429876038)

Explore a detailed 3D model of the International Space Station. Rotate, zoom, and select individual components to learn about their function and systems. Organize your view by turning parts and labels on or off.

**Highlights:** Interactive 3D ISS model, Rotate and zoom functionality, Selectable parts with isolation, Detailed information on components, Hierarchical part organization, Toggle parts and labels

**Features:** Vision Pro support

**In-app purchases:** none


### Schüler

[App page](https://appshunter.io/ios/app/schuler-german-flashcards/id1456522943)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is ISS Explorer free?

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

### Is Schüler free?

Schüler costs $3.99, with no in-app purchases.

### Do ISS Explorer or Schüler have ads?

Neither ISS Explorer nor Schüler shows ads.

### Which is updated more often, ISS Explorer or Schüler?

ISS Explorer ships an update every 10 months, and Schüler every 22 months. Most recently, ISS Explorer was updated on October 13, 2026 and Schüler 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.*