I am building eCommerce platform.This includes website,android app and iOS app. 

I already implemented for Android by using Google Play Install Referrer API.For Android,when users install from a referral link,we will get referral link and other data and match that when user sign up in our app.So,we can count referral score.

I searched for iOS solution,but i'm not getting any proper solution.

What should i do?

Thanks.