Multiplayer with multiple app ids

Question

I am interested in making an iOS game with a 2 player multiplayer aspect. I'd like to use Game Centre to send the data, which seems to work well with 1 app. What I would like to have is a paid and free version of the game, with the ability to play multiplayer between the paid and free versions.

The problem I have is:

Is it possible to use Game Centre to send data between the paid and free versions of the game, even if they have different app ids?

From what I've seen online, I don't think that it is possible, and I'll most likely have to have my own server to handle the data transfer. Any insight though would be much appreciated. Thanks!

Answer 1

There is such option in iTunes-connect.

Here is guide to it https://developer.apple.com/library/ios/#documentation/LanguagesUtilities/Conceptual/iTunesConnect_Guide/15_GameCenter/GameCenter.html

Here are two options you should be looking for

Groups: allows you to share your leaderboard and achievement data between apps. Apps in a group do not need to be multiplayer compatible.

Multiplayer Compatibility: allows you to specify which apps are compatible with a specific app and therefore, allow multiplayer games between the apps. Apps do not need to be on the same platform or in a group to be multiplayer compatible.