Receipt Maker funktioniert nicht

With the Receipt Maker app, you can create customized receipts and print, email, SMS, or share them.  Receipt Maker app allows you to create professional receipts in seconds.  You can choose from different themes and colors to make receipts and send them straight away.  You can sign these receipts and send them to your customers with a single tap.  Make the receipt with minimal information like customer name, service, amount, payment method, and receiver name. - You can purchase a monthly subscription ($1. 99/month) or an annual subscription ($19. 99/year). - Payment will be charged to iTunes Account at confirmation of purchase. - Subscription automatically renews 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 before the end of the current period.