Uber is an American venture-funded transportation company that enables people to use their smartphones to get a ride. The pricing system is similar to metered taxis, although it varies according to type of vehicle. App users enter their credit card information just once. For each ride the fare is calculated by time unless the vehicle’s speed breaks 11 mph, at which point it’s based upon distance. The fare, without a tip, is automatically billed at the end of the ride. Customers may choose to tip in cash, and they also can rate their driver through the app. The company arranges pickups in many cities around the world.