The present disclosure generally concerns sensor-equipped consumer electronic devices, such as smartphones and tablet computers. One implementation is directed toward a smartphone configured to operate in an image discovery mode. Results from the image discovery mode may be displayed on a smartphones display screen. The smartphone may concurrently operate an audio discovery mode. Results from the audio discovery mode are added to a discovery history, but are not displayed on the smartphone's display screen while operating in the image discovery mode. Of course, many other combinations and implementations are provided as well.