hunstand, a lot of guys use it on here. It is has some useful features and the wind/weather is usually good for me.
I have the Weather Channel App on my Ipad, and it is usually wrong on wind direction. I only hunt 7 miles north of the town, so that should not be that much of a factor considering that there are no major terrain features between here and there.
I downloaded HuntStand. That's pretty good--ability to get weather, see maps (online/offline), depict property lines (preloaded, although not exact), add markers/etc. to the maps, and more make this pretty good. The popup ads are a bit annoying, but it is free. Thanks.
I use scoutlook. Has been good for cataloging stand locations and I like the scent cone feature for wind direction.