Startup Neurio has developed an energy-monitoring sensor that can be installed inside a home’s circuit-breaker box to track the power usage of individual appliances in real time from a smartphone or tablet.

Neurio’s energy-consumption sensor
The $249 device will be available in April to consumers through the company’s website. It’s already available to Kickstarter backers at a discount.
The sensor uses Wi-Fi to connect to Neurio’s server and to smartphones and tablets in the house. The mobile devices can also monitor the senor from remote locations via cellular.