OMG I checked the NOAA weather forecast and yeech – a gale warning! Anchor pro is a great app. It keeps track of the boats position while at anchor and sounds the alarm if the boat goes outside of the set area. it keeps a history of what the boat’s been doing so you can see if you’re dragging anchor. so far so good I have three anchors out! the aberrations are from when I use the dinghy to run the anchors out side to side. I had the phone with me in the dinghy so it tracked me and the inflatable