I have the app and do like it, but my phone's camera quality doesn't seem good enough for this to work properly (iPhone 6). I have to get pretty lucky and be able to be super close to the bird so that very little zooming or image enlargement is needed.

Still, nice app as a field guide.

You can share your "life list" of bird sightings. Optional, but permissions get shown at install time instead of at use time.