Most trail apps answer one question: where is the path? Himalayan treks turn on others - where you can camp, how far apart those camps are, how much you climb before the pass, and whether any of it works with no signal at 4,000 m. Satellite maps you download before leaving. Campsites and shelters placed along the trail by distance from the trailhead. And you build your own day-by-day itinerary from every mapped campsite, not one operator's fixed schedule. Free, no ads.