Download the installer of LessonUp 1.2.2 that is free and take a look at users' reviews on Droid Informer. The app is developed for Android 4.4 and above. It's safe to download this application. LessonUp has created the tool that falls into the Educational category.
The most recent update was on Sep 5, 2019 and LessonUp was downloaded and installed by over 50K users. Users rated the app 1.8 on Google Play.