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: "I've never had a smart thermostat before, so I have nothing to compare it to. But this Nest device is amazing. Even better, the installation instructions are CLEAR and EASY to understand! There are interactive pictures and a text-based set of instructions online that take you through each step, and troubleshoot along the way. The thermostat works with my Google Mini and of course the Nest app. You can program what times you want the house to be at which temp and it will either start heating/cooling at that time, or you can set it to start before then, so it's nice and comfy when you get home. It has features for dealing with humidity and can even learn your temp preferences and adjust accordingly." —L Williams
Get it from Amazon for $209+ (available in seven colors).