There are GPS apps and there is this one.

A compete GPS, map and waypoint recording solution. Very slick and well written app and after months of use, bug free. I hike using this because it’s fuss free and reliable but I’ve also used it for wondering around Tokyo by foot without being contained by route directions of traditional nav. apps - the best way to find new things. Fab app.

Heck yeah, chest hair! about MilGPS, v5.2.0