iphone - Which data saving method i use? -

hi making app save data(say... time,location ,etc) many times in day

now have maintain full history of this...for months

so asking data saving type use

sqlite database or nsuserdefault (i aware of these 2)

or there other method?

thank you

you abstract of away using core data. right still need decide on backing store use (flat file, xml, sqlite). xml human readable debugging, large amount of data have, sqlite faster.
http://developer.apple.com/library/ios/#documentation/datamanagement/conceptual/iphonecoredata01/introduction/introduction.html