Please add to the mobile app the feature to be able to scan QR codes of invoices which contain the payment details of the invoicer, i.e. his IBAN, the amount, etc.
This makes paying invoices a matter of 2 clicks. (Scan QR + confirm payment)
This feature becomes more and more popular in Germany and many invoicing software apps add it to their features so that invoices are issued with such an payment QR code (e.g. Lexoffice) , as well as other German banking apps so to be able to read the code and execute the payment (e.g. Comdirect).