Agree the free apps are the best was to see what's actually going on out on the lake. WindAlert is what I have and its associated with the other apps people mention. A tip, the app asks you right away to let you always use your location. If you have an iPhone you can answer this anyway you'd like, than go into the app's setting and select to have it know your location only when it's open. No idea why it always wants to know your location...