ios - Mobile app integration with backend server with offline access -

ios - Mobile app integration with backend server with offline access -

a little design question here:

the requirements scheme go follows:

all content stored on backend in database the client(mobile app) downloads of info have local re-create offline access

the database on backend quite complex , contains entities/fields not(at to the lowest degree not currently) used in mobile client.

what right way design local database ? need create mirror re-create of backend database on client ? need create own info model regardless of on backend ? should there similarities between 2 info models @ ?

ios core-data mobile database-design