iPad, iPod, iPhone, MBP, iMac, AppleWatch, ... oh, that's already six devices tied to the same account. I think the idea is that you don't tie all your friends

iPad, iPod, iPhone, MBP, iMac, AppleWatch, ... oh, that's already six devices tied to the same account. I think the idea is that you don't tie all your friends' devices to your account to share apps etc., but I am just guessing.