i’m confused about something. i’ve been monkeying around with a garmin 276c and have some kind of sirius XM receiver of some kind for it. i do know it requires a paid subscription. can i get somtheing like this for the iphone as an overlay in something like garmin pilot? does something like the airplane app foreflight get “non wifi/cell” radar? i mean can i get “back country radar” on the cell while navigating? what about a “static” radar app that does not let me navigate at the same time like myradar or radarscope? is it accessible when you do not have cell or wifi?