I would suggest Weather Underground over the Weather Channel.
I believe it costs a couple bucks, but I like the iSolunar application. It gives you sunrise and sunset as well as the major/minor times for game movement on each day.
You won't need it for a while, but Field & Stream has a Rut Reporters application that is a good tool to have.
Someone mentioned Scoutlook, there is a hunting/weather application and a Deer Log application. I'd go for the Deer Log.