It's free to download the installer of IRMGARD, also, you can have a look at users' reviews on Droid Informer. The app works fine on Android 4.1 and higher. The download of this application doesn't contain viruses or any kind of malware. KOPF, HAND + FUSS gGmbH is the developer of the tool which can be found in the Educational category.
IRMGARD has been downloaded and set up by over 1K users and its most recent release is dated Feb 19, 2019. Users rated the app 4 on Google Play.