So my old iPod Touch died and I ended up buying a new iPad Mini Retina, and lemme tell ya, this app is really fantastic on this device. The added screen real estate and processing power really make a difference. If there are no cell networks available and you need to find your way somewhere in the continental US, all you need is this and a solar recharging solution for your iPad and you are good to go. 2 Gigs is a small price to pay IMO.