# Duct Sensor Assistant vs HygroSoft

The clearest difference is iOS requirement: Duct Sensor Assistant at 12.0 against HygroSoft's 14.2. 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.

Duct Sensor Assistant ships an update every 6 months, HygroSoft every 8 months. The most recent releases landed on September 16, 2026 and June 1, 2026 respectively.

## The numbers

| Metric | Duct Sensor Assistant | HygroSoft |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[1.0 (1 ratings)](https://appshunter.io/ios/app/hygrosoft/id6443735672/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 6 months** | Every 8 months |
| Monetization | — | Free |
| Size | 31 MB | 166 MB |
| Requires iOS | **12.0** | 14.2 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [BELIMO Automation AG](https://appshunter.io/developer/1149281298) | [Rotronic AG](https://appshunter.io/developer/1057939250) |

## What reviewers say

### Duct Sensor Assistant

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

**Features:** macOS Compatibility

**In-app purchases:** none


### HygroSoft

[App page](https://appshunter.io/ios/app/hygrosoft/id6443735672)

This utility app allows for easy configuration, adjustment, and updates of new Rotronic devices using your smartphone's NFC interface. It supports device setup even without a power supply.

**Highlights:** NFC interface for device interaction, Easy configuration of Rotronic devices, Adjustment and updates via smartphone, Supports devices without power supply, Compatible with HygroFlex series

**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 HygroSoft free?

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

### Do Duct Sensor Assistant or HygroSoft have ads?

Neither Duct Sensor Assistant nor HygroSoft shows ads.

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

Duct Sensor Assistant ships an update every 6 months, and HygroSoft every 8 months. Most recently, Duct Sensor Assistant was updated on September 16, 2026 and HygroSoft on June 1, 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.*