Nest Learning Thermostat ~ 2nd Generation: Meet the Nest Learning Thermostat. It learns from you and your home, programs itself automatically, and helps save energy when you're away. And you can control it using your smartphone, tablet, or laptop. In independent studies, the Nest Thermostat saved an average of 10%~12% on heating bills and 15% on cooling bills. Based on typical energy costs, your Nest Thermostat could pay for itself in less than 2 years. Calculate your savings here.