Has anybody seen an app that would let one trace out two routes and then have the app compute the distances? e.g. I want to walk to a shopping center that's about 5 miles away. There are two obvious routes, but it's not so obvious which one is shorter bco all the twists and turns. Sports Tracker and any of it's analogs would, of course, enable such a comparison after-the-fact - but I'd have to take Route A to the place and Route B home.... FWIW, I've got Google Maps, BackCountry Navigator PRO, and Osmand+ installed.