Nest Learning Thermostat is a household device than will automatically programs itself in a week, thus comfortable for you and lets you save energy. This device will let you feel comfortable without you changing the temperature constantly.
With nest learning thermostat, you only have to program the device once. After the initial program, you don’t need to program again on your future use because it has the auto-away and the energy history features become available as the nest is learning. The auto-away feature of the nest will set heating and cooling down when no one is around. The energy history on the other hand will show how much energy you have used daily. In addition, the nest learning thermostat has the leaf design indicator that will turn green when you save energy.
Source: Nest
