The app is totally safe for downloading. De Digitale School is the developer of WRTS that can be found in the Educational category. According to the latest info, the tool is rated 2.9 on Google Play.
This application was downloaded and installed by over 100K users and the most recent stable update was on Oct 16, 2020. You can download the installer of WRTS 2.0.1 free of charge and take a look at users' reviews on Droid Informer. The app runs on Android 4.0.3 and above.