This app offers you a great way to learn "Present Weather Symbols" by WMO.
Although Present Weather Symbols has 100 symbols, most people dont need to learn them all.
So given functionality of this app will allow you to select the symbols that you need to learn, and gives the questions based on your choice at random.
This is very easy to use yet very powerful app to support your learning experience.
If you need to memorize the symbols, this is a go-to app for you!