Schlicht UE Softwares is the official developer of the app which can be found in the Educational category. The developer rolled out a new version of the tool on Oct 30, 2016 and over 10 users downloaded and set up FlashCards Grego. People rated this application 3.9 on Google Play.
You can get the installer of FlashCards Grego 2.2 for free and read users' reviews on Droid Informer. The app works fine on Android 2.3.3 and above. It's safe to download the app.