It is an app for Seongwon IBook Land teachers, so you can easily work with the mobile app to create schedules, distribute, and send reading guides, and a QR code has been applied.As an app for teachers, Seongwon Ibukland members can not use the app.For more information, please visit Sungwon iBooklands website at www.ibookland.com or call 1588-6006.