If I have an app (bespoke) on 2 iPads, is it possible to sync the app data between these iPads using a cable only. (no wifi, no cellular, no bluetooth, no computer, etc). The iPads need to remain 'in airplane mode' for a better term. However I need to sync the data collected on each iPad, in the same app, so the same data appears on both iPads after the sync and all that data is viewable on both iPads. Thanks in advance.