Handy Library - Book Organizer is an Android app developed by HandyLib that helps users catalog their book collections or small libraries. With almost all the features required to replace a computer and barcode scanner, this app allows users to scan the ISBN to get book details from the internet and add them to their library. Users can use this app to manage their personal book collection, build a small public library, or inventory a library. It also helps users keep track of books they lent to or borrowed from their friends and reminds them when a book is overdue. The app allows users to sort their library by title, author, series, added date, published year, and other options. The app can export all books or a bookshelf to a XLS or CSV file and import them after editing the import file to have the same column format as the export file of the app. The app keeps user data private and safe, and users could create a backup to their Google Drive account and restore it anytime. The free version of the app limits the maximum number of books to 100, but users can upgrade to the Premium version to add an unlimited number of books with a lifetime license. The app supports 26 languages, including Arabic, Chinese, English, French, German, Italian, Japanese, Russian, Spanish, and Vietnamese.