In various example embodiments, a system and method for data mesh-based wearable device ancillary activity are presented. A device activity being performed in real-time by a user device of a user is detected. Attribute data associated with a plurality of attribute sources is accessed. A user preference indicating a preference for performing on a secondary user device a complementary activity corresponding to the device activity is inferred. Based on the inferred user preference, the secondary user device is identified according to a device status of the secondary user device, the device status indicating a device capability to perform the complementary activity in real-time. The complementary activity to be performed in real-time on the secondary user device is generated by analyzing at least one of the device activity, a device functionality of the secondary user device, and the user preference. Instructions to perform the complementary activity in real-time are transmitted to the secondary user device.