How Do I Add a Referral Program to My App?

You built something with Claude, ChatGPT, Bolt, or Lovable and you want users to share it with their friends and colleagues. A referral program rewards users for bringing in new users, creating a growth loop where your existing users become your acquisition channel. It sounds complex to build but most referral programs have a simple structure that your AI can implement quickly.

How Referral Programs Work

A referral program has three moving parts:

A unique referral link for each user. When a user wants to refer someone, they share a link like yourapp.com/signup?ref=abc123. The ref parameter identifies who sent them.

Tracking the referral. When a new user signs up using a referral link, your app records who referred them by reading the ref parameter and storing it alongside the new user’s account.

Awarding the reward. When the referral converts (signs up, or signs up and pays, depending on your program), both the referrer and sometimes the new user receive a reward.

Designing Your Referral Rewards

Before building, decide what the reward is. Common options:

Credits or discounts. The referrer gets a month free, a discount code, or credits toward their account when their referral pays. Simple to implement, directly tied to your product.

Cash. The referrer gets real money via PayPal or bank transfer. More motivating but more complex to implement and has tax implications.

Extended trial or feature access. The new user gets a longer free trial. Lower commitment for the referrer but still provides value.

For most early-stage apps, credits or discounts are the right starting point. They are simple to implement and keep the reward tied to your product.

How to Build a Simple Referral System

Ask your AI: “Can you add a referral system to my app? Each user should have a unique referral code. When someone signs up using a referral link (?ref=CODE), record who referred them in the database. When the referred user [signs up / subscribes], give the referrer [describe the reward, e.g. one month free, $10 credit]. Add a page where users can see their referral link and how many successful referrals they have made.”

Your AI will need to:

1. Add a referral_code field to your users table
2. Generate a unique code for each new user at sign-up
3. Read the ref parameter when someone visits the sign-up page
4. Store the referrer’s ID on the new user’s account
5. Trigger the reward when the conversion event happens

Using a Referral Platform Instead of Building

Building referral tracking from scratch is manageable but there are platforms that handle the entire system so you do not have to:

Rewardful integrates directly with Stripe and tracks referrals automatically when a referred user subscribes. The most popular option for subscription apps.

Tolt is a newer, simpler alternative to Rewardful with a cleaner interface and lower pricing.

ReferralHero handles referral campaigns including viral waitlist referrals where users get bumped up a waitlist for referring friends.

Ask your AI: “Can you integrate [Rewardful / Tolt] into my app to handle referral tracking? My app uses Stripe for payments.”

Making Referrals Easy to Share

A referral program is only as good as how easy it is to share. Reduce the friction:

Add the referral link prominently in the app, not buried in settings. Add a one-click copy button. Offer pre-written social media messages that users can share with one click. Send a reminder email to active users with their referral link.

Ask your AI: “Can you add a referral sharing page to my app that shows the user their unique link, a copy button, and pre-written shareable text for Twitter, LinkedIn, and WhatsApp?”

The One Thing to Remember

A referral program has three parts: a unique link per user, tracking who referred each new signup, and awarding a reward on conversion. Building it yourself requires a referral_code field, link tracking, and reward logic. For subscription apps, Rewardful integrates with Stripe and handles everything automatically. Start with a simple credit-based reward that is easy to implement and directly tied to your product value.

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New here? These might help: How do I add subscriptions and recurring billing to my app? → How do I add a waitlist to my app before it launches? →