Updated August 2022: Following the acquisition of ViewRanger by Outdooractive, I have updated this article by deleting ViewRanger from the step-by-step guide below and replacing it with Outdooractive.
So what exactly is a GPX file and how can you view the GPX files on your phone? This article is a step-by-step guide to show you how to download and upload GPX files to get the route on your phone. How frustrating it can be when your friend shares with you an awesome hike but you cannot open the map because they use a different application or you download the map of a walk you want to do online but cannot get it to work on your phone!!! This is because maps are in a GPX format.