"Free Books Butterfly for iBooks, Kindle, Nook, Kobo" is an education and reference app available for iPhone users. This app, developed by 7 Dragons Inc, offers a curated selection of the best free iBooks, Kindle books, Nook books, and Kobo books. Users can access daily deals and free book offers across different genres. The app allows filtering by genre, ensuring users can discover books of their interest easily.

With "Free Books Butterfly for iBooks, Kindle, Nook, Kobo," users can enjoy hand-picked selections with good reviews, enhancing their reading experience. It is important to note that separate Kindle and Nook apps for iOS are required to read the books offered through the app. To access more free books and great deals, users can share the app with friends and family, unlocking additional content. Stay informed about changing prices by checking the iTunes, Amazon, and B&N websites before making any purchases.