I just received my Apple Watch Series 2. Next week I am going trekking in Nepal and I am looking for an app to track my hikes using the built-in GPS. The Apple Workout app could work, but ideally I am looking for an app offering the ability to study my trekking on a map online later and possibly export a GPX file. I've tried Runkeeper, Runtastic and MapMyRun, but either the app doesn't work on the new Apple Watch or they use the iPhone GPS rather than the built-in one, draining the iPhone battery. Are there any apps that could do this? The main purpose would be to study my trekking on a map afterwards in a Garmin Connect/MyFitnessPal/Strava etc -type of way and the features during the hike is secondary. Continuous GPS updates are not important if a say once per minute update keeps the battery lasting longer.