# Duco Installation App vs Qbus Building Control

The clearest difference is update cadence: Qbus Building Control at every 4 weeks against Duco Installation App's every 2 months. Qbus Building Control also leads on device support (3 vs 1). On price, ads, in-app purchases and iOS requirement there is nothing between them.

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

Duco Installation App ships an update every 2 months, Qbus Building Control every 4 weeks. The most recent releases landed on November 3, 2026 and November 7, 2026 respectively.

## The numbers

| Metric | Duco Installation App | Qbus Building Control |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 4 weeks** |
| Size | 160 MB | 313 MB |
| Requires iOS | 16.0 | **15.6** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Duco](https://appshunter.io/developer/1245700074) | [Qbus](https://appshunter.io/developer/1229835233) |

## What reviewers say

### Duco Installation App

[App page](https://appshunter.io/ios/app/duco-installation-app/id1593421862)

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

**In-app purchases:** none


### Qbus Building Control

[App page](https://appshunter.io/ios/app/qbus-building-control/id6762758888)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Duco Installation App free?

Duco Installation App is free to download, with no in-app purchases.

### Is Qbus Building Control free?

Qbus Building Control is free to download, with no in-app purchases.

### Do Duco Installation App or Qbus Building Control have ads?

Neither Duco Installation App nor Qbus Building Control shows ads.

### Which is updated more often, Duco Installation App or Qbus Building Control?

Duco Installation App ships an update every 2 months, and Qbus Building Control every 4 weeks. Most recently, Duco Installation App was updated on November 3, 2026 and Qbus Building Control on November 7, 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.*