2020-05-26 00:00:00 btstWx Pro offers all the features of the free btstWx app. Those features include various views showing live weather data from your weather station... within 4 seconds. In addtion to those features, btstWx Pro offers a special polar wind speed/direction graph that replaces the 4 graphs in btstWx. The PolarWind™ Graph displays Wind Speed and Direction on a time-scaled polar graph. Three time options are available: 10 Minutes, 30 Minutes and 60 Minutes. For WeatherFlow SWS users, the PolarWind™ Graph shows data from the past hour (60 minutes) only.