I've never played the physical version before, but I'm a little confused by whether this game has a concept of an 'inventory' in which you store your excess cards. At first I thought that you can only store cards on your characters, so if you get 2 copies of Cure, for example, you either equip them on your characters or lose them forever. I believed this because most of the time, my character card customization screen looks like this:
http://imgur.com/2wRrbxS
However, I noticed recently that the very first time that I open the card customization screen in quest or adventure mode (bottom-right button) after starting the app, I have access to what looks like a collection of every spare card I've ever collected like this:
http://imgur.com/c0IxRn3
Running any encounter gets me to a point where I can only ever see the first image if I try to customize my cards.
Which one of these is intended?
If it helps, I'm playing on the most recent iOS on an ipad air 2