Decent enough port of a superb book. Still feels like a book and not an app. The “quick keys” seem really useful but are oddly hidden in the sort/filter menu. To be useful, it really needs to include the diagrams on pages 43, 68 and 69 from the book. Without these, the app is much less useful.
bmccorkleetc,
Crash
Major problem is that the app crashed on Eastern Forktail page 2. Other pages seemed to be OK on their page 2, although I only checked a few before discovering the crash.
Photos were OK. But, photos in the text pages were sometimes missing.