This is not especially a critical review, for some this app may be useful but the basic problem is that most authors have little sense of whats useful or not when theres no cell service. I have downloaded and/or purchased and later deleted at least 50-100 GPS apps without finding any that function as needed for raw hiking, something I do for several months a year. By "raw" hiking I mean hiking where there are no marked trails, in remote locations where, for days at a time, there is no absolutely no data or cell service. It seems every app wants to phone home and if it cant, complains constantly. What I want from a GPS app when it cant communicate, or I tell it not to, is to work just using GPS only, no maps, no data service no wifi, and no complaining either. When I start a 3-4 day hike in remote sections of Montana I want to disable cellular data, wifi, auto updates and so on to increase battery life as much as possible. Next I want to mark my start location, then tell the app to wake every 5 minutes (or whatever interval I choose) and drop a breadcrumb marker. No map, just a plain white screen with the GPS location location marker. This creates a dotted line showing my track. Next, since I often follow game trails with many branches, I want to be able to tap the screen to drop a pin at my current location, this way if the trail ends or waters out I can back trail to my branch point. This, in itself is enough and I would pay for it. If it also included the ability to save the the track and display some basic stats such as distance, pace and so on it would be great, but above all, when its in stand alone (dropping breadcrumbs) mode its first priority should should be to save battery power, do Not try to communicate, hunt for wifi or cellular data. Apps frantically trying to download maps or phone home when no service exists can drain a phone battery in a few hours, many lock up and fail to work at all. Please remember, trees dont have charging plugs. This is the most basic GPS functionality, track me, thats it.