I use Gaia GPS and I find it much faster and easier to map out your hike on a home computer, then download it to your phone. You can also print your maps with the track or waypoints on them. If you want to make sure that the maps are on your phone, put your phone on airplane mode and then open the app. The GPS portion has never given me any issues, unless I'm in a deep hollow. Under heavy tree cover it may take a minute to find you.