It's secure to download the app. Určování slovních druhů has been originally created by Ant. Vonderka and it is included in the Educational category. The developer rolled out a new version of this application on Mar 11, 2017 and over 100 users downloaded and installed the tool.
It's free to download the installer of Určování slovních druhů, also, you can read users' reviews on Droid Informer. The app works fine on Android 4.0 and above.