Premium service only gets me mobile security/phone finder for my iPads?

I purchased the premium service today because it said I would also be able to protect my iPads. When I followed the email for set up, it installed mobile security/ phone finder. As near as I can tell it doesn't do much.  Am I doing something wrong or am I now going to have to pay for a service I believe I already paid for? If so, this is very misleading! Has this happened to anyone else? sad