You can view the Quick video tour of what it does -
Or you can view the screenshots in the app store here - https://play.google.com/store/apps/details?id=com.tennistoolkit
I hope you will download it and try it out even if you don't play tennis.
P.S. I originally only made it available in English speaking countries but I have changed that to all countries as I was getting hits from a variety of non-english speaking countries. If anyone reads I be curious to know how text to speech works when it receives an english word such as "forehand" when the phone is using italian or german as it's native language. I suspect they don't sound out in recognizable English but perhaps I'm wrong. Can anyone tell me?