To start tracking your movements through GPS, tap the plus sign in the bottom right corner, then tap “Record Track.” Even if without cell phone service, you can start, pause or stop your track. When you stop your track, you can choose to discard or save your progress. While tracking, your distance will be shown on the home screen at the top. If you tap on that it will bring up your tracking stats and elevation profile. Alternatively, you can also access your stats through the tracking button that turns green while the track is active.