A mobile app known as "refer and earn" provides incentives for users to share it with their social network. A referral program built into these apps gives users a special code or link to share. A rewslots machines gratisard is given to the original user when they refer new users using this referral information. Rewards come in many forms and could be cash, discounts, gift cards, or other incentives. Refer and earn apps help businesses grow their user base by using them as a marketing tactic. Businesses use word-of-mouth marketing to reach potential customers by incentivizing current users to recommend the app.