If you want a list of a bunch of different kinds of woods with a picture or two, then this reference is fine. However, if you are really trying to identify a type of wood, youll come up short with this app as I did. There are not enough pictures or detailed descriptions of the wood to really tell because the photos shown look very similar for varieties. For example, by looking at the pictures I really couldnt differentiate between, say, black walnut from cherry.
I was trying to identify the wood on pocket doors in an old Victorian house and this was no help.
To do an adequate job identifying wood, you need some close-up shots, some pics of a large piece to show variation, some with different finishes, some quarter-sawn, etc. Different pieces will have a different look, and one or two small sample shots really wont do the trick.
I ended up just doing a Google search for images and found a plethora of examples for free. I was disappointed I spent money for such a limited view here.
Somehow I thought the description said you could take a picture of wood and it would help you identify it. That was why I bought the app. If really this is a feature somewhere, I have yet to find it.
Old House Girl about I.D. Wood, v3.20