I am getting the AirNav Pro App when it comes out in the summer. they do the App for iPhones but a Galaxy is an Andriod (as you know)
As seen here - -! If the electric window heat is on then it f-messes up the signal.
There is a dongle which you can get to pin or stick onto the windscreen. this, apparently, improves sig recep greatly - but, if the sig is affected by the window heat then . . . .
You will also find that apart from moving map display you also get VOR ILS PFD, complete with Alt, Spd, ROC or ROD i.e., VSI - nice. . . and, turn and slip too !
All for 40 odd $ollars.
Hail to today, the future.