Control the heating and cooling of your space more efficiently with the Google Nest Learning Thermostat. On a single iOS/Andoird app, users can control up to 20 thermostats, changing their set temperatures with the push of a button. Nest's smart programming helps you save money, adjusting itself to your preferred temperatures based on your home's insulation and the weather outside. With built-in activity sensors, it also avoids heating an empty home!