DO NOT INSTALL THIS APP!
It is not maintained anymore, some features are not working properly now.
PLEASE USE THE WEB APP instead. More info at https://www.windguru.cz/apps.php
Windguru website is made as a Progressive Web App (PWA), which means it can be installed and work just like an app on your Android device. It is continuously updated, takes almost no additional space on your device and offers full functionality.