Both the Weather Channel App and the Weather Nation App. Those two have slightly different temps and forecasts for the same cities, not completely different like rain vs. dry, but sometimes a difference of as much as 7 degrees, and that can make a for a different experience.
The Weather Nation app can keep many more cities in favorites, a 14 day forecast, and has a better UI, IMHO. I often prefer it for those reasons, but I think Weather Channel app is a little more accurate, but I like getting an idea of what it may be like over a week out.