# TROVIS 55Pro vs KEMPER HS2

The clearest difference is iOS requirement: TROVIS 55Pro at 9.0 against KEMPER HS2's 15.6. 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.

TROVIS 55Pro ships an update every 8 months, KEMPER HS2 every 4 months. The most recent releases landed on October 26, 2026 and November 1, 2026 respectively.

## The numbers

| Metric | TROVIS 55Pro | KEMPER HS2 |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 8 months | **Every 4 months** |
| Monetization | — | Free |
| Size | 23 MB | 29 MB |
| Requires iOS | **9.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [KT-Elektronik, Klaucke und Partner GmbH](https://appshunter.io/developer/943003350) | [Gebr. Kemper GmbH + Co. KG](https://appshunter.io/developer/971204756) |

## What reviewers say

### TROVIS 55Pro

[App page](https://appshunter.io/ios/app/trovis-55pro/id943003351)

**Features:** macOS Compatibility

**In-app purchases:** none


### KEMPER HS2

[App page](https://appshunter.io/ios/app/kemper-hs2-app/id971204757)

Configure and manage your KHS-HS2 Hygiene-Flushing Box. View settings, read flushing logs, and easily update firmware for your device.

**Highlights:** Configure Hygiene-Flushing Box, Display adjustment values, Read flushing logs, Transmit firmware updates, Manage KHS-HS2 settings

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

**In-app purchases:** none


## Frequently asked questions

### Is TROVIS 55Pro free?

TROVIS 55Pro is free to download, with no in-app purchases.

### Is KEMPER HS2 free?

KEMPER HS2 is free to download, with no in-app purchases.

### Do TROVIS 55Pro or KEMPER HS2 have ads?

Neither TROVIS 55Pro nor KEMPER HS2 shows ads.

### Which is updated more often, TROVIS 55Pro or KEMPER HS2?

TROVIS 55Pro ships an update every 8 months, and KEMPER HS2 every 4 months. Most recently, TROVIS 55Pro was updated on October 26, 2026 and KEMPER HS2 on November 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.*