This IS the GPS app you're looking for.. – GPS Tracks Review

I looked at a lot of GPS apps and wasted money on several too limited to be useful. I wanted a tool for planning, mapping, and tracking kayak trips on rivers and waterways and this works perfectly. I lay out my route on the iPad (bigger screen) sync that to iPhone, then Tracks guides us down the route. Blazing new trails? Open map, hit start and Tracks maps your path giving course, speed, elevation, coordinates etc. with or without cell service. Very sensitive and accurate. It will get you where you want to go and safely back again. On 5s I can let it run with occasional checking on location and camera use and get a good 6hrs run time on a full battery. Feature rich, it takes a little time to learn all it can do but well worth the investment. If you need an off-road GPS tool, this is it!
Review by Drewcifer68 on GPS Tracks.