The innovative Display-TAN method is a secure and - at the same time - convenient TAN method, i.e. a method which confirms money transfers. The money transfer may be among bank accounts or among payment network accounts.
The method/app does not execute payments, it just confirms ("signes") them so that the payment cannot be manipulated by malware within the Internet or on the end device.
Small payment providers - like regional money organizations, regional banks or small startups - which do not have their own app will let their customers use this app in order to defend the online payments against manipulation.