Mobile payment apps are digital platforms that enable users to make financial transactions directly from their smartphones. These apps facilitate various types of payments, including peer-to-peer transfers, in-store purchases, online shopping, and bill payments. Popular mobile payment apps like Apple Pay, Google Pay, PayPal, and Venmo use near-field communication (NFC) technology, QR codes, or direct bank transfers to process payments securely and efficiently. Users can link their bank accounts, credit cards, or debit cards to the app, allowing them to pay with just a few taps. Mobile payment apps offer convenience, speed, and security features such as encryption and biometric authentication. They also provide functionalities like transaction history, expense tracking, and sometimes reward programs, making them a versatile tool for managing day-to-day financial activities.