So Skydemon definately lookslike the ticket.
do people really simply use it on their mobile? to me the screen would seem to small.
ipad - again for me i think the screen would be too big? Un less the AC you in has a holder bolted in already.
If your using skydemon and this goes tits up and wanted o verify with a back-up, presumably this would be a cheap secondary device, but if it's electronic also will it not suffer with a lot of similay symptons stopping you use your primary GPS?