What's the best Android app for saving money on gas, earning fuel rewards, and paying securely at the pump using my phone?

Shell: Fuel, Charge & More is a great app for saving money on fuel, earning rewards, and making secure payments at the pump. It allows you to conveniently pay for fuel directly from your phone at participating Shell stations, eliminating the need to swipe your credit card at the pump. The app provides opportunities to earn fuel rewards, potentially saving you money on every gallon. Many users report saving at least 10 cents per gallon regularly, with opportunities to stack savings even higher by purchasing select items inside the store. The app also proactively addresses customer service issues and offers support. However, one drawback reported is the lack of a physical receipt within the app. Overall, it streamlines the fueling process and offers tangible savings. It also offers additional savings when purchasing items inside the store.