1. A method of identifying data to transmit from one mobile device to another mobile device, the method comprising: presenting a root user interface on a display of the mobile device to a user, the root user interface having a plurality of graphical indicators that each correspond to a type of relationship between the user of the mobile device and another individual, each of the plurality of graphical indicators also having an associated set of data that is related to the corresponding type of relationship; receiving a selection from the user of one of the plurality of graphical indicators; presenting a secondary user interface on the display of the mobile device to the user, the secondary user interface corresponding to the graphical indicator selected by the user and displaying the associated set of data that is related to the type of relationship reflected by the selected graphical indicator; and receiving a selection from the user of at least a portion of the displayed set of data for transmission to a mobile device of the other individual.