Absolutely reccomending! Last night it saved us. There was a strong wind and we were without any option than use an anchor. So I found and downloaded this app. During the night anchor went free and we began to move. App started with alarm, woke me up, so I went out and saw we are moving... App is easy to use, you just set gps location and it measures how far you are. Great thanks to developers for simply but great funcionality :)