Also, Cash App is another popular refer & earn app that allows users to earn rewards by referring friends who sign up and make qualifying transactions. Cash App's straightforward referral sramy gamecheme has proven successful in bringing in new users & boosting activity on the network. Finally, a well-known investing app called Robinhood offers bonuses for referring users who sign up using the referral link & for the referrer themselves. With personal referrals, Robinhood's refer & earn program has been effective in bringing on new investors and growing its user base.