Update: may now have stopped crashing but need more time to check. After being moved from ViewRanger I found Outdooractive mapping & route planning to be 5*. However, gps tracking is 1*. After a few hours it stops tracking & app crashes. I can't trust app to track walks. Over last year, after each app update I try again but the issue has not been fixed. I'm forced to gps track in ViewRanger and then export to Outdooractive BUT NO YOU ARE ENDING VIEWRANGER 😡😡 Might try the Ordinance Survey app