Great
I have been using this app on my full time travels for the last 7 months. I anchor about 50% of the time and use this app as my “I can sleep well tool”. I anchor in the lightest conditions and up to when it blows 6-7 bft. I set my anchor the best I can and then I set this app. It gives me peace of mind and I keep my iPad close by while I sleep. Knowing that it will wake me when something goes wrong. Great app, just does what it says it does. Would recommend and by it any time.