The Best Smart Thermostats

If you've ever used an iPod, the Nest Thermostat will be familiar to you--in fact, it was designed by Tony Fadell, the designer of the original iPod hardware. Changing the temperature is as simple as rotating the thermostat's dial. You can use the app to set a traditional time-of-day schedule--far simpler than most non-smart thermostats--or let the Nest learn your daily habits and adjust the temperature automatically. This feature is great for those who don't want to put in any effort, but might be a bit too confusing for people who like to fine-tune their schedules, so you can turn it off if you wish. Like many other smart thermostats, the Nest can save you energy by adjusting the temperature when you aren't home, as determined by your phone's location and the Nest's built-in motion sensors, and it's also compatible with the energy-saving plans and rebates offered by many utility companies.