Integration can mean two devices working together or may even go deeper. Yale, for example, let Nest develop the remote controls for the Linus lock and place them in the Nest iOS and Android apps. That saved Yale the work of writing a set of apps for the product, something many device makers don't want to spend time on, Hu said.
Also on Thursday, Nest is introducing the Nest Cam API for third parties to integrate their devices with the connected camera that Nest announced earlier this year. Several already have, including Philips, which is linking its Hue connected lightbulbs to the Nest Cam so they can turn on if the camera sees movement.
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