MapOnMap is a tool where you can place your high detailed hiking map on top of an online map, i.e. an Overlay Map. I have found it useful to have a tool, where I'm able to photograph a map, which I can navigate with the phone's GPS. It could be a map on an information board, a tourist guide map or a hiking map etc. MapOnMap also supports Track Navigation. With MapOnMap you can record and navigate with GPX-tracks. It also supports Track Geofence, which means that you get a voice notification if