BOOKSCAN Reader is a books & reference app by BOOKSCAN with 5,000+ downloads (about 8.6K estimated). +9 installs in the last 7 days. Released May 18, 2012. Install growth, rank history, SDKs and ad networks.
From the store listing: “It is the only tool that can enjoy a download a file that was turned into PDF (http://www.bookscan.co.jp/) provides BOOKSCAN, a collection of customers.”