As temperatures begin to drop, your heating bill goes up. Trying to find the perfect balance of warm, comfortable, and not having your dad yell at you for even thinking of going near the thermostat is a very delicate dance. With Nest, you don't have to worry about any of that! As the first thermostat to receive an Energy Star from the EPA, it learns the temperatures you like and programs itself, turns itself down when nobody's home, stores your energy history so you can see how much you use and why, connects to Wi-Fi so you can control the temperature from your computer or phone, lights up to show you the time, temperature, and outside weather, and works with Google Home and Amazon Alexa. The only thing it doesn't seem to do is make you breakfast!
Promising review: "Love my Nest! Installation was very simple, and it's been working great. Our first week (when it 'learned' our habits) fell during a transition week in the fall when we alternated between the AC and the heat. The system was still able to put together a fairly good pattern for us. The app is also very easy to use." —MDS
Get it from Amazon for $199.99 (available in four colors).