Smart phone apps for tree Identification

[jjw4413]

Just picked up a new smart phone and was wondering if anyone is using a smart phone app to help identify tree species? Is so what app work the best?

 

[Grace Tree]

I have both Audubon Trees A Field Guide to North American Trees and North American Trees by Slinger. They're OK but I found the easiest is to find a website that is particular to your area and stick a browser shortcut on my phone. I use this one but it won't do you much good in Nevada.
Phil
Identify Tree by Scientific Name

 

[littlejoetqt]

Thanks, Small wood. I know my trees pretty well, but there's always the occasional confusing one. I live in WV, so many of these trees also grow in my area.