I have a native app in which I want to make all the data offline and constrained to each device. There should be no cloud sync of DB and data on one device should not be synchronized to cloud and then to other devices. What I have found is that first launch of app requires internet connection and it will perform sync. After this first sync, how to make the app fully offline capable and stop synchronization of data? What will be correct sync configuration for such scenario? Will offline(preserve data) config for all the entities work? Does it mean that it will not change any local data of device upon synchronization?