Reward-Based Android & iOS App

I’m building a dual-platform mobile application where users earn in-app coins by watching AdMob and Facebook Audience Network rewarded ads, then spend those coins on social-media boosts—specifically Likes, Followers and Comments... (Budget: ₹1500 - ₹12500 INR, Jobs: Android, API Integration, App Development, iOS Development, Mobile App Development, Node.js, PHP)