The good bits:
The product tour and registration forms are polished. The product tour uses seamless transitions and keeps the Sign In/Register buttons docked at the top as an exit route. The sign-in flow is simplified to 3 steps and optimizes for faster typing by having keyboards open by default, using input masks, allowing credit card scanning, and using a progress meter.
After registering the app quickly confirms your mobile number by sending a text. Once done, it drops you immediately into an active map view, defaulted to your location, with the first step for ordering a vehicle ready and waiting for you to confirm.
To be improved:
While the product tour is well-designed, it doesn’t capture how easy it is to reserve a car and may even inflate the amount of work it takes to get started. Instead, it might be best to let users interact with the live map view. At least from there, they could get a sense of the number of cars available in their area and general wait times.
It’s also a large ask to get users to put in their credit card info up front. Being required to register is a large enough point of friction, but asking to also save their payment method can cause customers to balk. Also, if you a user doesn’t have their credit card on hand when they download the app, it slows them down from registering or at least getting familiar with the app. Perhaps Uber could let users register, then offer to save their credit card after they make their first reservation.