# Hansen Ventilation vs BauKalk

The clearest difference is in-app purchases: Hansen Ventilation at none against BauKalk's 2. Hansen Ventilation also leads on iOS requirement (15.0 vs 17.0). On price, ads and device support there is nothing between them.

Both are free to download. BauKalk sells 2 in-app purchases, starting at $5.99 per year. Hansen Ventilation asks for nothing beyond the download.

## The numbers

| Metric | Hansen Ventilation | BauKalk |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 7 months | — |
| Size | 14 MB | 4 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [EP spa](https://appshunter.io/developer/1688557966) | [Adrian Lazariuc-Hadrava](https://appshunter.io/developer/796900037) |

## What reviewers say

### Hansen Ventilation

[App page](https://appshunter.io/ios/app/hansen-ventilation/id6503288430)

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

**In-app purchases:** none


### BauKalk

[App page](https://appshunter.io/ios/app/baukalk-construction-calc/id6761668004)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| BauKalk Pro Jährlich | $5.99 | per year |
| BauKalk Pro Lebenslang | $17.99 | one-time |


## Frequently asked questions

### Is Hansen Ventilation free?

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

### Is BauKalk free?

BauKalk is free to download, with in-app purchases available.

### Do Hansen Ventilation or BauKalk have ads?

Neither Hansen Ventilation nor BauKalk 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.*