Methods, systems and devices for linking devices to tracking devices is provided. One method includes scanning, by an activity tracking device, for a semi-unique identifier broadcasted by a device. The method connects the device with the activity tracking device after the semi-unique identifier is found to be of the device by the activity tracking device. The activity tracking device is configured to communicate with the device to obtain a device identification (ID) of the device. The method then automatically linking the device to the activity tracking device when the device ID of the device matches a copy of the device ID stored in the activity tracking device. In one example, the tracking devices operate as a master and the devices operate as a slave.