I need a clean, reliable mobile app that runs on both iOS and Android and takes all the manual work out of organizing an 8-player doubles round robin. The core logic should automatically create every unique pairing so each player partners with everyone else exactly once (seven matches per person), then schedule the matches seamlessly. After each game, players or the host must be able to record the result with a single tap. Wins and losses should feed straight into a real-time leaderboard that awards points accordingly and reorders positions instantly when new scores arrive. Key flow I’m picturing • Players register in-app, pay their entry fee, and immediately see the full match list. • Payments need to accept both credit/debit cards and PayPal through a secure, PCI-compliant gateway. • Push notifications alert players of upcoming games or any schedule changes so nobody misses a court time. Tech freedom is yours—native or a robust cross-platform stack—as long as performance feels snappy on modern phones and the UI stays intuitive for non-technical users. I’ll look for: 1. A pairing algorithm that guarantees no duplicate teams or repeat partners. 2. A clear leaderboard view with automatic recalculation. 3. Smooth, sandbox-tested payment integration. 4. Solid push notification implementation (Firebase or similar is fine). 5. Clean, well-commented code and a brief hand-off guide. If that sounds straightforward, let me know your preferred tech stack and timeline so we can get matches rolling.