Driven by rising demand for fitness and health monitoring features as well as by improved user interfaces, shipments of sensors used in wearable electronic devices will rise by a factor of seven from 2013 through 2019, according to IHS Technology. The worldwide market for sensors in wearables will expand to 466 million units in 2019, up from 67 million in 2013. Shipments of sensors will climb much more quickly than the market for the wearable devices themselves. Wearable devices will increase to 135 million units in 2019, less than three times the total of 50 million in 2013. According to IHS, the average wearable device shipped in 2019 will incorporate 4.1 sensor elements, up from 1.4 in 2013.