Now on Sale!!!The most popular printed field guide to North American birds is now available in its entirety on the iPhone and iPad!**If you would like to experience the app check out the newly release...

Featured in Apple's 'Apps for the Great Outdoors' and 'New and Noteworthy Reference Apps' and in the New York Times!Check out our 5 star reviews! "Finally a real tracking app!!!" "The best tool I've...

Featured in Apple's 'Apps for the Great Outdoors' and 'New and Noteworthy Reference Apps' and in the New York Times!Check out our 5 star reviews! "Finally a real tracking app!!!" "The best tool I've...

This is a LITE version of The Sibley eGuide to the Birds of North America but is fully functional and includes ONLY 30 species, compared to 813 species in the full app. If you like the way this app wo...

★★★★★ FREE for a Limited Time! ★★★★★ Best Anatomy Body Facts!Get all the cool facts about the human body in this amazing app! The human body is a complex machine, with intricate pa...

Includes both translations, English and Spanish, and an extensive number of full definitions; all terms have been carefully classified and coded for easy understanding regardless of your expertise lev...

★★★★★ FREE for a Limited Time! ★★★★★ Best Anatomy Body Facts!Get all the cool facts about the human body in this amazing app! The human body is a complex machine, with intricate pa...

This is a LITE version of The Sibley eGuide to the Birds of North America but is fully functional and includes ONLY 30 species, compared to 813 species in the full app. If you like the way this app wo...

* Featured by Apple in "STAFF FAVORITES" and "WHAT'S HOT" Features that make Advanced English Dictionary stand out from other dictionary apps:● Widely recognized as the most comprehensive English di...

This application covers 27 North American waterfowl species, helping you make an ID by comparing the bill with a full-size image, or by observing body size and shape. For birds both in the hand or on...

Concise English Dictionary & Thesaurus is the ideal, all-in-one reference, with a dictionary and a thesaurus combined in one handy, integrated app. "The app’s clean interface, speed, and size make i...

MARA3D (Mobile Art Reference App) is the ultimate real-time 3D app for human anatomy reference! This app features unlimited 3D viewing angles, pinch, pan & zoom, beautiful female 3D models, multiple l...

Includes both translations, English and Spanish, and an extensive number of full definitions; all terms have been carefully classified and coded for easy understanding regardless of your expertise lev...

★★★★★ FREE for a Limited Time! ★★★★★ Best Anatomy Body Facts!Get all the cool facts about the human body in this amazing app! The human body is a complex machine, with intricate pa...