Smart thermostat
Smart thermostats are thermostats that can be used with home automation and are responsible for controlling a home's heating and/or air conditioning. They perform similar functions as a Programmable thermostat as they allow the user to control the temperature of their home throughout the day using a schedule, but also contain additional features, such as sensors and WiFi connectivity, that improve upon the issues with programmable thermostats,
Ecobee
The ecobee4 is ecobee's flagship product which was originally launched May 3, 2017. It is a touchscreen thermostat that works with up to 32 remote temperature/motion sensors to adjust the thermostat based on where you are. It also has IFTTT integration. An updated version of the ecobee3 was released in 2015 that works with Apple HomeKit. The ecobee3 lite was released on October 17, 2016. The ecobee3 lite is a less expensive thermostat that resembles the ecobee3, but does not include any remote temperature sensors. Support for remote temperature sensors was added to the ecobee3 lite in March 2017.