Had been trialling the free version on my Android phone for over a month (in my search for a suitable replacement for Viewranger), tracking my daily walks, and was actually very impressed. However the app stopped tracking last week. On checking the app mid-walk it throws up an error message: "Strava has recovered from a problem and has resumed your recording" and the graphic shows straight lines. This morning I didn't check my phone mid-walk and on returning home and it had recorded 0.00 !! :-(