Fitivity Tennis app for Iphone and droid--Good ?

[Nostradamus]

https://itunes.apple.com/us/app/fitivity-tennis-training/id738156962?mt=8

So I downloaded this app for my android. Now it looks kind of complicated and extensive. Does it work ? Any experience of this helping your tennis gaem ??

 

[jakepanj]

I really like the app. Although I already did everything the app suggests to do.