# Jonny vs ERLUS Profi

The clearest difference is review sentiment: ERLUS Profi at 67% against Jonny's 29%. Jonny's advantage is iOS requirement (12.0 vs 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.

Jonny ships an update every 6 months, ERLUS Profi every 4 months. The most recent releases landed on October 9, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | Jonny | ERLUS Profi |
| --- | --- | --- |
| 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 | **66.7% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 4 months** |
| Monetization | Free | Free |
| Size | 10 MB | 26 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [mb AEC Software GmbH](https://appshunter.io/developer/739076412) | [ERLUS AG](https://appshunter.io/developer/1113943917) |

## 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


### ERLUS Profi

[App page](https://appshunter.io/ios/app/erlus-profi-app-dach/id952643496)

This tool assists professional roofers by allowing them to create and manage construction projects, select roofing tiles, and perform precise calculations for wind load, snow protection, and material quantities. It guides users through data input and offers PDF exports for project summaries and product details.

**Highlights:** Create and manage construction projects, Select appropriate roofing tiles, Calculate material quantities, Determine wind load safety, Calculate snow protection systems, Export project summaries as PDF

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

**In-app purchases:** none


## Frequently asked questions

### Is Jonny free?

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

### Is ERLUS Profi free?

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

### Do Jonny or ERLUS Profi have ads?

Neither Jonny nor ERLUS Profi shows ads.

### Which is updated more often, Jonny or ERLUS Profi?

Jonny ships an update every 6 months, and ERLUS Profi every 4 months. Most recently, Jonny was updated on October 9, 2026 and ERLUS Profi on October 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.*