Cross-Platform Tournament Management App

I need a single code-base solution that lets me run free-fire style tournaments seamlessly on iOS, Android, and the Web. The core flow is simple: players (or full teams) create an account with email + password, register for an event, get auto-placed into the match schedule, and then I can record or update scores so standings update in real time.

My ideal build keeps the interface clean for mobile while still giving me a full dashboard online, so frameworks such as Flutter, React Native or even a well-structured PWA backed by Node/Firebase are all fine as long as you can ship a responsive experience across those three platforms.

Deliverables
• Production-ready apps for iOS, Android, and a responsive web portal
• Secure email/password authentication set up end-to-end (sign-up, login, reset)
• Modules for: player/team registration, match scheduling, live score & result tracking
• Simple admin panel to create tournaments, edit brackets, and publish results
• Clean, commented source code in a Git repo and a short hand-off guide

I’ll handle store accounts and hosting; you push builds, walk me through basic deployment, and we’re good. If the above sounds straightforward to you, let’s talk timeline and pick the most efficient tech stack.