Ridesharing has rapidly become part of the modern lifestyle. In 2015, the use of ridesharing apps surpassed the use of taxis. In just a few short years this relatively new concept turned into a multi-billion dollar industry. That continues to grow every day. Though a handful of ridesharing apps have come to surface. Uber has risen to the top as one of the most popular apps to date. Also, Uber has a worldwide user base of 8 million people and a net value of 51 billion. The numbers only continue to grow day by day. This guide will cover all the ins and outs of using a Uber promo code.