We used Gamecenter because me and my partner didn't really have the expertise of setting up the server side that would be required for an app like this, so we d

We used Gamecenter because me and my partner didn't really have the expertise of setting up the server side that would be required for an app like this, so we decided to let Apple take care of that for us. We also didn't want people to have to make new usernames and passwords and have to find their friends again in a new service. Thanks for those, I will keep all of this advice when we are ready to submit the next update.