I'd be curious, too. The one I've used on Android, "LiveWeather," doesn't show any data any more. I just go to the noaa.gov web site
now, but I'd be interested in a better app if anyone has a suggestion.
If they pull the real-time buoy data from the source, no one app is going to be more accurate than any other. It's more about the ease of use and clarity of the display.