# Instruments vs Karl

The clearest difference is iOS requirement: Karl at 13.0 against Instruments's 15.6. On price, ads, in-app purchases and monetization model there is nothing between them.

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

## The numbers

| Metric | Instruments | Karl |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[1.5 (2 ratings)](https://appshunter.io/ios/app/instruments/id420636379/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 89 months | — |
| Monetization | Free | Free |
| Size | 385 MB | 42 MB |
| Requires iOS | 15.6 | **13.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Livecast](https://appshunter.io/developer/360252763) | [KULDIG](https://appshunter.io/developer/1315396634) |

## What reviewers say

### Instruments

[App page](https://appshunter.io/ios/app/instruments/id420636379)

Explore a unique collection of 18th and 19th-century scientific instruments used for research and public demonstrations. Discover artifacts related to electricity, acoustics, light, magnetism, thermodynamics, and measurements, all housed in their original museum setting.

**Highlights:** 18th and 19th-century scientific instruments, Covers electricity, acoustics, light, magnetism, Thermodynamics and measurements included, View instruments in original museum setting, Housed in Ovale Zaal and Instrumentenzaal

**Features:** Vision Pro support

**In-app purchases:** none


### Karl

[App page](https://appshunter.io/ios/app/karl-marx-haus/id6478696475)

Explore the Museum Karl-Marx House with virtual tours and directions. Access exhibition texts in multiple languages and audio guides to deepen your understanding of the exhibits.

**Highlights:** Virtual tours and directions, Exhibition texts in 7 languages, Audio guides in German and English, Interactive site map, Historical exhibition slider

**In-app purchases:** none


## Frequently asked questions

### Is Instruments free?

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

### Is Karl free?

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

### Do Instruments or Karl have ads?

Neither Instruments nor Karl shows ads.

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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.*