# Jonny vs Karlskron

The clearest difference is update cadence: Jonny at every 6 months against Karlskron's every 25 months. On price, ads, in-app purchases and device support there is nothing between them.

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

Jonny ships an update every 6 months, Karlskron every 25 months. The most recent releases landed on November 1, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | Jonny | Karlskron |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.0 (1 ratings)](https://appshunter.io/ios/app/jonny/id739076409/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 28.6% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 6 months** | Every 25 months |
| Monetization | Free | — |
| Size | 10 MB | 28 MB |
| Requires iOS | **12.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [mb AEC Software GmbH](https://appshunter.io/developer/739076412) | [Cosmema WITTICH GmbH](https://appshunter.io/developer/1573270034) |

## What reviewers say

### Jonny

[App page](https://appshunter.io/ios/app/jonny/id739076409)

Visualize 3D architectural models on mobile devices. Explore buildings, rotate views, and adjust perspective with intuitive gestures. Facilitates communication between designers and clients, especially for house builders during the planning phase.

**Highlights:** 3D model visualization, Mobile presentation, Intuitive gesture controls, Free rotation and perspective resizing, Client communication tool, Early planning phase visualization

**Features:** macOS Compatibility

**In-app purchases:** none


### Karlskron

[App page](https://appshunter.io/ios/app/karlskron/id1578087520)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Jonny free?

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

### Is Karlskron free?

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

### Do Jonny or Karlskron have ads?

Neither Jonny nor Karlskron shows ads.

### Which is updated more often, Jonny or Karlskron?

Jonny ships an update every 6 months, and Karlskron every 25 months. Most recently, Jonny was updated on November 1, 2026 and Karlskron on November 3, 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.*