I am developing news reader app, and client wants to have monthly subscription. This is easy enough, but he wishes to have one month of free trial for each user. So after user downloads app for the first time, he has one month of free use and after that period, he has to pay subscription fee (auto renewable subscription).
I am stuck on how to implement this. Any ideas? Preferably without need to connect to my server and handle user registrations and trials from there.
Thanks!