Cross-Platform Game Top-Up Platform

I’m building a complete game-top-up ecosystem for my brand, Gaming Shohor. The job covers a consumer-facing mobile app for both iOS and Android as well as a matching website, all running on one back-end so inventory, pricing, and user data stay perfectly in sync... (Budget: $50 - $80 USD, Jobs: Android, API Development, Flutter, iPhone, Mobile App Development, Payment Gateway Integration, PHP, React Native, Web Development)