RELATED: The 7 Best Baby Monitors That Track Every Scream, Snore, And Heartbeat Let’s say the Nest Protect senses smoke or fire. After telling the Nest Thermostat to turn the fans off (damn, Nest Thermostat, are you trying to get us all killed?), it notifies the Nest App, which alerts you and tells the Nest Cam to start streaming video so you can see what’s going on. The Nest App will also tell you when the Nest Cam senses movement in predetermined “activity zones,” so no one can sneak in and steal your kid when they’re young, and your kids can’t sneak out and steal your booze when they’re older. Granted, your parents were able to keep you in line without this newfangled smart technology, but now you can do the same thing without ever getting out of bed. Buy Now $179