Hello there, I have high experienced in Reading RAW, XML, JSON, CSV, SQL files in Objective C iOS and Manipulate according to need. You can Use Core Data or Realm Database which is far more easiest in integration , Migration and to Predicate.
I can deliver this product in fast turn around, please ping me any time on freelancer.com or skype ID: csengineer321
We can have more discussion about it,
Thanks!