The company also slashed the price of its watch to $99.
At the start of 2014, smartwatch maker Pebble opened up its platform with the launch of an app store. On Tuesday, it further expanded its ecosystem with a software update that lets developers build apps that monitor a user's physical activity and sleep, even when the app is closed. In addition, the company cut $50 off the price of the Pebble and Pebble Steel watches to $99 and $199, respectively.