The download of the app doesn't contain viruses or any kind of malware. Digitalhaus ag is the creator of Regensburger that can be found in the Business category. Over 10 users downloaded and installed the tool and the latest release was on Oct 20, 2020.
On Google Play, this application was rated 4 by its users. It's free to get the installer of Regensburger, also, you can have a look at users' reviews on Droid Informer. The app works fine on Android 5.0 and above.