The BKK PwC app provides insured individuals with a seamless way to communicate with BKK. With this app, users can easily submit their sick leave certificates, request membership certificates with just a click, upload their photo for the health insurance card, or order a new card. It also allows for hassle-free updates of personal information such as address and bank details, as well as the submission of invoices. Secure communication with BKK is made possible through a message inbox within the app. It is important to note that the app contains sensitive social data, and therefore requires two-factor authentication for the transmission of individual information. To ensure security, users receive an smsTAN via the GSM network upon logging in.