What's the best Android app for getting cash back every time I buy gas?

Marathon ARCO Rewards is designed for drivers who frequently refuel and want a straightforward loyalty program. The core function is earning 'Fuelperks!' rewards on every gallon purchased, which can be redeemed for discounts on future fuel or in-store items. The app facilitates payment directly at the pump by linking a payment method and membership number, aiming to streamline the transaction. For real-world use, a commuter filling up weekly could see consistent savings accumulate over a month, effectively lowering their fuel costs. However, some operational friction exists. User reviews indicate that while the rewards system itself is effective, not all listed station pumps are configured correctly, sometimes requiring an in-store transaction or a follow-up with customer support to receive credit. The support team is noted for resolving issues, such as crediting accounts after users submit a photo of their receipt. The interface is reportedly straightforward for tracking rewards balance and transaction history. For consistent users of Marathon or ARCO stations, the app provides tangible, incremental savings, though its utility is geographically dependent on station participation and proper pump setup.