For people trying to cut costs on goods and services they already use or earn some extra money, this may be especially enticing. Refer and earn apps are an inexpensive means forummy all new appr app developers to expand their user base and bring in new users. Through word-of-mouth marketing, app developers can reach potential users who might not have discovered their app through conventional marketing channels by utilizing pre-existing social networks. Also, apps that encourage referrals can aid in boosting user retention and engagement.