2025-09-13 00:00:00 Important note: in order to use smileApp Proffix, the correctly installed Proffix REST API is required for communication with Proffix. smileApp Proffix is ​​a powerful, modular app with free use of your addresses and contacts from Proffix on your mobile device. The addresses are synchronized and are then available offline. No API license from Proffix is ​​required to use the addresses. The app is used to implement your individual mobile needs in connection with Proffix. Here we name just a few of the options according to the user groups: