Best Overall Smart Thermostat
The Google Nest is one of the most popular smart thermostats on the market. It has a home/away assist mode to automatically adjust the temperature when you leave your house and has remote access through an app so you can control the temp from anywhere using your phone. The app can also send you alerts if something doesn’t seem right or send helpful reminders for maintenance. It’s compatible with 95% of HVAC systems and is easy to install, usually in 30 minutes or less, with everything you need in the box.