Smart thermostats function just like regular thermostats. You can control the device via a smartphone app, but you can also use the touch-based interface on the device itself—just like on a traditional thermostat. Many people choose to adjust the temperature with the conventional controls as they become more accustomed to the app. This function also saves you from discomfort if you ever lose Wi-Fi (or misplace your phone) for an extended time, such as during a storm or scheduled maintenance in your area.