Emerson Sensi Wi-Fi Programmable Thermostat for Smart Home, Compatible with Alexa for $98.99 shipped. Here is a screenshot for reference. You can connect this Sensi thermostat to the home’s Wi-Fi network and control it from anywhere via its free mobile app (Android/iOS). It also features geofencing for location-based temperature control and 7-day flexible scheduling to help reduce wasteful heating and cooling when no one is home. Most places have it for about $128.