I've been giving this app a decent test over the last month having taken up the offer to old Viewranger users. Despite the annoyance over the take-over of Viewranger I really was hoping for more. On a superficial examination it seems fine offering most of what the old app had to offer. Crucially, however, its performance in the field lets it down. Sadly I have found it to be completely unreliable, initially tracking a walk only to stop for no obvious reason and needing to be restarted. This seems to be linked to OA's origins as an app that (unlike VR) needed to be always online. Despite being in offline mode I regularly receive voice prompts to turn on data. These often coincide with with the tracking stopping. Whilst you can quickly locate your current position it is useless for route recording. A recent walk around Studland Bay of around 8 miles ended up in three sections with two chunks of several hundred yard completely missed. This is even worse when trying to follow a downloaded route which becomes plagued by these voice prompts and breaks in recording. On a recent walk from Dyrham Park I had to give up following the route and simply make up the route as I went along. Also unlike VR with routes there is no simple option to show the route on an existing map so you can trace the path as you go. Even if you have already downloaded a section of map that includes the area of the walk, it will download the map again. It also insists on giving you directional voice prompts en-route whether you want them or not. Even with data turned on I often walk in areas with poor signal quality and these same problems occur again and again. I'm going to stick with it a while longer and see whether the developers can actually sort out some of these issues but it feels as though a ground up rejigging is needed. They should try beginning with the excellent Viewranger engine and adding the OA features to it rather than the other way round. As things stand I find the OS app, Back Country Navigator or Memory Map all far more reliable. In particular if the OS can introduce proper recording of distance covered, speed, time etc I likely be switching to them. Unless that is OA can actually get their act together and make their app as reliable and functional as VR was. At present it is a frustrating and irritating experience.