The app is completely safe for downloading. BlackForest Apps is the developer of HFU Mensa which can be found in the Productivity category. The latest release was on Oct 9, 2016 and the tool was downloaded and set up by over 1K users.
The overall score for this application is 4.3 on Google Play. Get the installer of HFU Mensa 1.1.4 that is free and take a look at users' reviews on Droid Informer. The app is built for Android 4.0 and above.