Publishers Weekly reports that Book Retriever, a $0.99 iOS app launched by St. Louis-based K-8 educational distributor Classroom Library, matches children's reading levels with 136,000 titles in its database. The app uses a proprietary database of leveling information based on four leveling systems that was developed by Benjamin and Marla Conn, Classroom Library's founders.
Parents can use a built-in ISBN barcode scanner to determine whether a
book is appropriate for their child's reading level, and teachers can
use it to create reading lists for their students. The barcode scanner
can also be used to build a database of a home's or school's books. The app can also print ISBN barcodes for titles in its database that can
be applied to a home's or school's books.