We all have our favorites, I suppose. The one I use most for weather is the free Raindar application for my Android smartphone. One click and I'm looking at weather radar for my current position showing estimated times till something bad will intersect with my location. I find this very valuable and easier to use than RadarNow!. When I need a forecast, WeatherBug is standard. I also appreciate the weather alerts from WeatherBug and the fact outside air temperature at my location is shown at the extreme top left of my Android screen. It is an excellent free application.