I searched for similar question, but didn't find exact answer to my question.
I'm building phonegap application for iOS which will have online/offline sync functionality. I want to sync offline SQLite database with JSON data from server every time application will launch. I think It can work slow when user will launch app for the first time (100% of data will be fetched), because sync function will have to download over 50 images...
I don't even know if appstore will approve solution like that.
What is the best solution for that kind of problem?