Know before you buy – iBird Pro Guide to Birds Review

I've had this app less than 24 hours and although it is a good app for identification of birds by sight or sound I was very disappointed to discover some of the features require an additional purchase. For the price I paid the app should identify birds in my location but it doesn't...that's an add on $ feature. UPDATED COMMENT...Developer's comments supports my review.
Review by ThruHim on iBird Pro Guide to Birds.