Type your commute into a new app, and it will tell you the fastest way to get there using essentially every local transportation option available–from the subway to a bike to Uber to a water taxi or a bus–and the carbon footprint, cost, and length of that trip versus driving in your own car. “We’re trying to get people–in a clever, smart way–out of cars, plain and simple,” says Jonathan Whitworth, co-owner and chief strategy officer of Greenlines Technology, the company that created the app, called Cowlines. (The name, used in urban planning circles, refers to the fact that cows in an open field will choose the most efficient route to walk home.) “We want to help reduce greenhouse gas emissions.”