Only OK
This should not be a $5 app. Its tricky to use as some of the choices are unclear or difficult to decide. Pictorial cues are fine, but too few to be terribly helpful. The final ID should show all the descriptors selected. The GPS locator is a neat idea but should have a way to delete entries. Overall, its OK if you know a lot of plant terms & have an idea of what youre looking at but confusing or useless if youre new to the field. Youre better off with a book.
Yklepp about
Arbor Day Tree Identification Guide: What Tree ..., v1314