The technology described in this document can be embodied in a computer-implemented method that includes receiving location information associated with a location of a user-device, and receiving, from one or more sensor devices, user-specific information about a user associated with the user device. The method also includes estimating, by one or more processors, based on (i) the user-specific information and (ii) the location information, a set of one or more parameters indicative of social interactions of the user. The method further includes generating a signal representing informational output based on comparing the set of one or more parameters to corresponding threshold values, and providing the signal for causing a presentation of the informational output on an output device.