# Duct Sensor Assistant vs Sauermann Control

The clearest difference is update cadence: Sauermann Control at every 3 months against Duct Sensor Assistant's every 6 months. Duct Sensor Assistant's advantage is iOS requirement (12.0 vs 14.0). 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.

Duct Sensor Assistant ships an update every 6 months, Sauermann Control every 3 months. The most recent releases landed on September 16, 2026 and July 24, 2026 respectively.

## The numbers

| Metric | Duct Sensor Assistant | Sauermann Control |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 3 months** |
| Size | 31 MB | 18 MB |
| Requires iOS | **12.0** | 14.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [BELIMO Automation AG](https://appshunter.io/developer/1149281298) | [SAUERMANN INDUSTRIE](https://appshunter.io/developer/1169513729) |

## What reviewers say

### Duct Sensor Assistant

[App page](https://appshunter.io/ios/app/duct-sensor-assistant/id1559862597)

**Features:** macOS Compatibility

**In-app purchases:** none


### Sauermann Control

[App page](https://appshunter.io/ios/app/sauermann-control/id1638898324)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Duct Sensor Assistant free?

Duct Sensor Assistant is free to download, with no in-app purchases.

### Is Sauermann Control free?

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

### Do Duct Sensor Assistant or Sauermann Control have ads?

Neither Duct Sensor Assistant nor Sauermann Control shows ads.

### Which is updated more often, Duct Sensor Assistant or Sauermann Control?

Duct Sensor Assistant ships an update every 6 months, and Sauermann Control every 3 months. Most recently, Duct Sensor Assistant was updated on September 16, 2026 and Sauermann Control on July 24, 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.*