Smart meters and smart thermostats are different devices – meters provide you with information about usage and costs on an in-home display, smart thermostats instead enable you to control your thermostat via a phone, tablet or computer, wherever you are. The two devices often pair well together: you can use a smart meter to monitor your costs, so when you use the smart thermostat to turn up the heating, you can see how much extra it’s costing you nearly in real time.