Should I save in plist or Core Data?

I would not consider plists for anything other than saving simple preferences and really basic data structure. Plus performance wise, retrieving and saving data to plists can be quite slow.

Just some advices that could help in your app design.

I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.