It is simple and straight to the point. After the application starts just tap it, you will get all the information at the screen.
Weather Vane does not access any of your data, just the network status and internet. The ammount of internet data consumption is minimal, allowing you to use it as many times as you like without worrying about your data consumption.
Soon we will update Weather Vane with more functionalities like: choosing the location, settings and whatever you suggest in the comments.