Sensi Smart Thermostat is a free iPhone application developed by Emerson Climate Technologies Inc. It falls under the Lifestyle category and provides extensive compatibility with HVAC equipment found in most homes. Sensi Smart Thermostats work with most HVAC systems, except for baseboard heat and some other systems. The app offers an easy-to-install and easy-to-use interface with clearly illustrated, in-app instructions that walk you through each step from start to finish.

The application serves as an intuitive remote control that lets you set, change, and program your home comfort from anywhere. The Sensi app offers flexible 7-day scheduling and usage reports, service reminders, geofencing, auto changeover, circulating fan, humidity control, temperature limits, smart alerts, local weather, early start, A/C protection, and keypad lockout. Sensi Smart Thermostat also provides smart home compatibility with platforms like Amazon Alexa, Google Assistant, Apple HomeKit, and SmartThings. However, it requires a common wire (c-wire) for Apple HomeKit, heat-only systems, cool-only systems, and heat pump systems. Humidification requires additional equipment, and a professional installation is recommended for the same.