The main features of an Uber clone app include a user-friendly interface, real-time tracking and mapping, in-app payment options, driver and passenger profiles, ratings and reviews, trip history, fare estimation, ride cancellation options, and support for multiple languages and currencies. The app also includes advanced features such as surge pricing, ride sharing, referral programs, and integration with popular third-party services like Google Maps and Stripe for payment processing. Additionally, the app should have robust security features to protect user information and ensure safe transactions.