Cool app, BUT, most of the time the forecast data is inaccurate. Take today for example: I live 50 mi from my marina so I really rely on weather data/ forecasts when deciding if Im going sailing or not. This morning was clear and beautiful at my house; looked like it should be a great day to sail, but first I checked sail flow and was surprised to see it indicated that it was raining hard at my marina, (Channel Islands,Ca). It forecasted rain to end around noon. I checked the weather app on my iPhone for same area....it called for sunny/ clear all day! I decided to drive to marina; got there at 11am and was pleased to find clear skies ... Beautiful! Opened up the sail flow app and it said it was currently raining! Decided to delete the app