Nest is improving both its apps and its camera smarts. An update to both iOS and Android apps (if your phones and tablets are on the latest versions) focuses on notifications, with Nest Aware subscribers getting the bulk of the benefits. Over the next few weeks, Aware customers will see automatic door detection appear on both their indoor and outdoor Nest Cam feeds. The cameras will attempt to recognize motion patterns over time, feeding the data into deep learning algorithms to make it all automated, automatically creating "activity zones" around doors it picks up. The cameras can then send you notifications when there's movement in that area. You'll also be able to redraw activity zones if your camera detects something different -- or if there's multiple doors.