Mobile apps that encourage users to share the app with their social network are known as Refer and Earn apps. Users get a special code or link to share with others when therummy apps all listy refer others. By referring new users, the referrer receives incentives like cash, gift cards, or discounts. Companies use these apps as part of their marketing strategy to get new clients based on referrals. The finance, food delivery, ride-sharing, and e-commerce sectors are among those in which Refer & Earn applications are widely used.