Paying for an Uber is a breeze. I step out of the car and go on my way. Behind the scenes, Uber has identified me, recorded my fare, added a gratuity, and sent me a digital receipt that I can easily forward to Expensify. That’s the way I want all my payments to be. Paying for Uber with a mobile phone is less work than using a credit card, which is the biggest competitor for share of wallet of in-person payments.