Refer and earn initiatives are frequently used by companies and startups to quickly expand their user base. Both app developers and users gain from this strategy: businesses can reach a wider audience without spending a lot ofrummy expert apk money on marketing, and users can get compensated for referring friends to apps they like. The ability of refer and earn apps to build beneficial relationships between users and app developers & promote organic growth through user-to-user recommendations is the main reason for their popularity in the mobile app market. Depending on your device, the first step in using a refer and earn app is to download it from the App Store or Google Play Store.