Smart thermostats have been dropping in price steadily as more players enter the market, so there’s really no reason to install a dumb model these days. But if you’re working with a tight budget, and don’t mind giving up some of the fancier features the top-shelf models offer, this one from iDevices works with all three of the major digital assistants—Alexa, Google Assistant, and Siri—and it can be integrated into Apple’s HomeKit ecosystem, too.
It’s not the slickest or most feature-rich thermostat you’ll find, and doesn’t offer the highest build quality—heck, it doesn’t even have a trademarked name—but you can pick one up on Amazon for about $100. Outfitted with a tiny, 2-inch, color LED display inside a glossy white enclosure, iDevices assumes you’ll manage it with either voice commands via a smart speaker or with its mobile app. It can control one- and two-stage heating, heat pump, and cooling systems; and ventilation fans. If your HVAC system is any more complex than that, look elsewhere. iDevices has a handy online compatibility checker if you’re not sure.