A computer-implemented method, a computer system and a computer program product dynamically change the user interface on a mobile device. The method includes displaying a user interface on a first device. The user interface includes a set of graphical controls corresponding to a plurality of functions of the first device. The method also includes connecting to the second device in response to a determination that the device includes a capability not included in the plurality of functions of the first device. The method further includes determining an aggregate function set for the first and second devices that includes the plurality of functions of the first device and is updated to include the capability of the second device. Finally, the method includes modifying the user interface of the first device based on the aggregate function set by adding a graphical control corresponding to the capability of the second device.