Do you really need GPS to tell you how to get somewhere on the bike? I thought it was mostly for determining ride results. Are the instructions different for a bike than a car? Does the software know which routes are suitable for bikes and which are not. Otherwise for this purpose the Maps app that comes with the phone would be just as good. I wonder if you can run two GPS apps at the same time, a cycling app for results and the Maps app for turn-by-turn although I still don't see the point of the latter.