I actually use two: WeatherBug, which updates to reflect your current location when you open it, It will update every 15 minutes-6 hours, depending on your settings, and of course updates when you open it. You can also have it track you in the background (I don't use this.) I also use Radar Now, which is only radar, but it's animated, so you can see where precip/storms are headed, which I like. If WB had animated radar, it would be perfect for me.