I use one called PictureThis. Only the free version. You can take pics of the trees and it will identify them for you and there is a place in each to put notes.
Myself and the girlfriend just got over it. For us it was a bad sinus infection. I really only had a fever for a couple days but the gf ran a fever off and on for a week and a half.
Just came across this one. Very cool read. I have been thinking of doing this. Very cool flight pen. Any update on this? Are you still raising them? Are you seeing any making it to next spring?