Cross-Platform Betting App Development

I want to launch a complete betting experience that runs smoothly on iOS, Android, and any modern Web browser. The project includes both the mobile apps and the public-facing website, all driven by a single back-end so updates roll out everywhere at once. Core functionality I need from day one: • Live betting with real-time odds refresh and bet settlement • Secure in-app payments covering the major gateways plus local options we will shortlist together • User profiles with KYC support, balance tracking, and detailed bet history The exact wagering categories—whether sports, casino games, horse racing, or a mix—can be finalised once we review licensing and market priorities, so bring your insights on industry compliance and regional restrictions. I’m open on the tech stack as long as it yields native-feeling iOS and Android apps alongside a responsive web version. If you prefer Flutter, React Native, Ionic, or a similar framework, outline why it’s the best fit and how you’ll handle real-time data (Socket.IO, WebSockets, Firebase, etc.) and payment security (PCI-DSS, tokenisation, 3-D Secure). Acceptance criteria: 1. Pixel-perfect UI/UX prototypes approved before development starts. 2. Fully functional iOS, Android, and web builds passing my test scripts for live betting, deposits/withdrawals, and profile management. 3. Clean, well-documented code and deployment scripts so I can scale servers or add new bet types without rewriting core logic. If you’ve shipped betting or fintech apps before, especially with live data streams and payment integrations, let’s talk about timelines and a phased rollout plan.