Multiple iOS apps with single database and single log on

I created multiple apps in android with single database (Content provider) , single log on (which means if i login in one app it should work for all , if I logout from one app it should logout from all other apps) , I have to open one app from another app and every day I have to update all my off line data to server (it should happen particular time on every day ) . Now I am going to port this system (all apps) to iOS , is it possible in iPhone ? And I am not going to submit this apps to app store.