Drucker App funktioniert nicht

Smart Air Printer supports most printers including models like Brother, Canon, Dell, Epson, HP, Kyocera, Lenovo, Lexmark, Panasonic, RICOH, Toshiba, Xerox and many others.  Smart Air Printer allows you to print your photos and documents easily.  Select any documents or photos, choose the print and print directly anything you want.  Support emails from any email clients (iOS-built email, Gmail, etc...  This app supports most AirPrint printers.  It is an all-in-one printer app.  We are not affiliated with the mentioned companies in any way.  We have only developed and tested our App with these devices. • Payment will be charged to your iTunes account at confirmation of purchase and will automatically renew (at the duration/price selected) unless auto-renew is turned off at least 24 hours before the end of the current period. • Account will be charged for renewal within 24-hours prior to the end of the current period, and identify the cost of the renewal. • You can manage your subscription and/or turn off auto-renewal by going to your iTunes Account Settings, but refunds will not be given for any unused portion of the term.