To sum up, there are several advantages to using Refer & Earn apps, including simple earnings for users, the opportunity to learn about new goods anall new appsd services, economical user acquisition for businesses, and insightful user behavior data. There are a ton of Refer & Earn apps on the market, and they all provide various incentives and rewards for referring friends. The following are some of the best Refer & Earn apps to take into account: 1.