Light Limitr is a simple yet effective app that controls how many smart lights are allowed to be active in your household, especially designed for people who are concerned about energy bills and the environment.

The app works on the basis that if there are only three people in one house then in theory there should only need to be a maximum of three lights turned on at any time. It connects to your smart home network and limits how many smart lights (such as Phillips Hue, Lifx, Ikea) are active at any time. This prevents people from leaving a room empty without switching off the light.