I have read reviews and decided to try Book Crawler and BookBuddy. BookBuddy is so easy to use, just pick up your device and start scanning. (Reminds me of the Fitbit app in its format, so simple.) I love how you can use your entire screen to scan, not having to align to an outlined box. And you can scan multiple books at once, before needing to review and save. There isnt a good option for marking a book as read, however, without having to choose an exact date (which is annoying if, like me, you are just starting to catalog a large home library). Thats only a little thing, but I really had to think hard about choosing this app over others as it didnt recognize about 25% of the first batch of books. Of those, a few it did recognize did not have cover pics. Maybe my choices were obscure, youre thinking. Umm, no. Two were Newbery Medal winners! Really? It couldnt find Number the Stars by Lois Lowry? The Newbery and Caldecott book lists should be a priority! Same for other award lists. That being said, it did recognize a book I doubted it would find, as it is from a local author more regionally known. Books that werent recognized can easily be searched for and added, which makes this app workable enough for me to keep using it. With updates, I assume increasingly more books will be able to be recognized.