An entrepreneur has created a device that tracks your water use and makes recommendations on how to lower it. The device uses machine-learning algorithms to identify whether the water is going to a shower or a sprinkler, and alerts you via an app if there’s a leak. If the system identifies that a large amount of water goes to a certain activity—such as watering a lawn—it can also help someone identify where to make strategic changes. As water bills continue to rise in the US, this device could help homeowners save money.