Whilst i think of another way to kill myself ill carry on using the good old map like im used to!
Is it Michelin, AA or CAA?
As a long time user of Tom Tom, I can't imagine what it displays that can be of any use in an aeroplane. Lat and Long is no use unless you have a relevant map to plot it on in which case look out of the window!
Once upon a time there was a Road Almanac called "Bradshaws"; pilots who followed roads were known as "Bradshaw Pilots"
My phone has Tom Tom and Memorymap in it, now the latter is useful for showing a student where they have been, especially their circuit patern.