sorry if i missed your reply cc -
i'm having trouble with my tracks disappearing when I zoom in to see where i've traveled. if the map is zoomed out enough to show the entire track, it will display fine (but basicly useless). the moment the start or finish locations are off screen, the track disappears.
hints or clues please ?
Yes, Android AND iphone GPS works without cellular data. Use offline maps and enjoy. (thanks drtbyk!)