# Sauermann Control vs HygroSoft

The clearest difference is update cadence: Sauermann Control at every 3 months against HygroSoft's every 8 months. 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.

Sauermann Control ships an update every 3 months, HygroSoft every 8 months. The most recent releases landed on October 30, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | Sauermann Control | 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 3 months** | Every 8 months |
| Monetization | — | Free |
| Size | 18 MB | 166 MB |
| Requires iOS | **14.0** | 14.2 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [SAUERMANN INDUSTRIE](https://appshunter.io/developer/1169513729) | [Rotronic AG](https://appshunter.io/developer/1057939250) |

## What reviewers say

### Sauermann Control

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

**Features:** Vision Pro support

**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 Sauermann Control free?

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

### Is HygroSoft free?

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

### Do Sauermann Control or HygroSoft have ads?

Neither Sauermann Control nor HygroSoft shows ads.

### Which is updated more often, Sauermann Control or HygroSoft?

Sauermann Control ships an update every 3 months, and HygroSoft every 8 months. Most recently, Sauermann Control was updated on October 30, 2026 and HygroSoft on October 5, 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.*