Cross-Platform WhatsApp-Style Chat App

I want to launch a real-time chat application that feels as familiar as WhatsApp but removes the paywall entirely and runs everywhere—iOS, Android, and in the browser. The core experience must cover one-to-one... (Budget: ₹600 - ₹1500 INR, Jobs: Android, Flutter, iOS Development, iPhone, Mobile App Development, PhoneGap, React Native, Web Development)