About the size of a smart phone, the Sense Energy Monitor installs in a home’s electrical panel and uses machine learning to automatically sense the electricity in the house, tracking it in real time. In the Sense app, homeowners can tell how much energy they are using and how much it costs. They can check energy usage by day, week, month or utility billing cycle. Sense also lets the homeowner set goals, track progress and get alerts at specific billing or usage levels. It can also learn the energy “signatures” of appliances so that it can track their usage and energy consumption in real time.