# HF Bau App vs kontrool

The clearest difference is update cadence: kontrool at weekly against HF Bau App's every 2 months. HF Bau App's advantage is iOS requirement (14.0 vs 17.0). 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.

HF Bau App ships an update every 2 months, kontrool weekly. Both last shipped on November 2, 2026.

## The numbers

| Metric | HF Bau App | kontrool |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Weekly** |
| Size | 18 MB | 94 MB |
| Requires iOS | **14.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Husemann & Fritz EDV Organisations- und Beratungs GmbH](https://appshunter.io/developer/1349246567) | [tabya GmbH](https://appshunter.io/developer/1417209216) |

## What reviewers say

### HF Bau App

[App page](https://appshunter.io/ios/app/hf-bau-app/id1349246568)

**Features:** macOS Compatibility

**In-app purchases:** none


### kontrool

[App page](https://appshunter.io/ios/app/kontrool/id1417209217)

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

**In-app purchases:** none


## Frequently asked questions

### Is HF Bau App free?

HF Bau App is free to download, with no in-app purchases.

### Is kontrool free?

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

### Do HF Bau App or kontrool have ads?

Neither HF Bau App nor kontrool shows ads.

### Which is updated more often, HF Bau App or kontrool?

HF Bau App ships an update every 2 months, and kontrool weekly. Most recently, HF Bau App was updated on November 2, 2026 and kontrool on November 2, 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.*