If you have other smart devices in your home, look for a thermostat that works with as many of them as possible. The Nest Learning Thermostat works with other Nest devices, as well as numerous third-party devices including smart switches, fans, and lighting systems. IFTTT support is a popular feature that allows you to configure the thermostat to trigger other compatible devices and services (or vice versa). For example, you can create an applet that turns on a smart air conditioner when your thermostat reaches a certain temperature. Matter is another emerging standard to look out for, as it promises to unite the IoT ecosystem across brands and standards. Many of the latest smart thermostats support Amazon Alexa, Apple Siri, and Google Assistant voice commands. That means you can change temperature settings and find out the current temperature simply by speaking. Some of the most feature-rich smart thermostats have built-in Alexa voice control and can do just about everything that a smart speaker does; you can ask them to play music, get the latest news and sports scores, find out the weather forecast, change temperature settings, and much more.