[whpalmer4]

OmniFocus syncs automatically 1 minute after you make a change, and hourly thereafter, assuming of course that you have sufficient connectivity to sync. You can always tap the sync button yourself when you switch back to OmniFocus if you are worried about somehow getting out of sync. Not a bad idea when switching devices to do a sync on both old and new, which both makes sure that any changes made on the old device are backed up in the cloud and also that the new device has any changes that have been made elsewhere since the time it last synced.