560081 Add sqlite to existing iphone app

I have existing iphone app where user can tag location. User can currently tag location and uialertview with uitextbox pops up so user can add a subtitle to the pin. The tag takes the location in the center of the screen. Currently the app will not save the annotations after the app has been closed out completely. I need the app to save the annotations until the users taps "Clear Map" these annotations can either be saved in sqlite db, plist, or xml, whichever will be the fastest.