Given that people are more inclined to believe recommendations from friends & family, word-of-mouth marketing can be very successful in growing the app's user base. In order to appropriately reward people who recomm777 appended them, refer earn apps frequently feature built-in tracking systems that enable them to link new sign-ups or purchases to particular users. In general, refer earn apps function by rewarding users for referring others to the app, which promotes word-of-mouth advertising and helps the app gain new users. Both users and businesses gain from the increased growth and acquisition of users. Users are rewarded for their efforts.