BookScanner Book Leveler App funktioniert nicht

With BookScanner, you can quickly scan the ISBN of the book to find the AR quiz number, ATOS (also ZPD) level, points, word count, interest level, as well as, via a one-time in-app-purchase, the Lexile measure, equivalent Fountas & Pinnell Level (F&P) / Scholastic Guided Reading Level (GRL), Guided Reading Grade Level information, and Developmental Reading Assessment (DRA) information.  BookScanner is always up to date, has nearly 10,000 5-star ratings, and a history of over 10 years in the App Store, it is the ideal app for anyone who has to work with popular reading comprehension systems in school. No barcode on your book?  How many times have you had to type in a book name to find out what level it is, or how many points it's worth, while holding the book in your hand?  This is a Universal App with custom screens for iPhone and iPad devices to fit the specific screen size - including support for the latest iPhone models. iPad devices also have support for landscape mode and split view.  This history can be viewed within the app, or you can email, print, or share PDF and CSV files of your scanned book list.  BookScanner App and If Then Dev, LLC are in no way affiliated with Renaissance Learning, Inc. **Lexile and the Lexile Framework are registered trademarks of MetaMetrics, Inc.  Feedback from parents, school teachers, and librarians is that this is a MUST-HAVE app! *AR and Accelerated Reader are registered trademarks of Renaissance Learning.  You can also type in the ISBN or title and author to look up a book and add it to your history.  Your scanned books will save to a history list for easy reference later on.  Once exported, you can reference your list through a spreadsheet, print labels, or save for safekeeping.  Apple Silicon Macs can also run the iPad app natively on macOS.  BookScanner App and If Then Dev, LLC are in no way affiliated with MetaMetrics, Inc.