The Unionized Kingdom—an exclusive network of high-net-worth members—now needs a dedicated productivity mobile app that launches simultaneously on iOS and Android. The goal is to streamline daily operations for this private circle through secure scheduling, encrypted messaging, shared task boards, and resource approvals, all wrapped in a polished, intuitive interface. Scope • Cross-platform build is preferred for maintenance speed, yet I’m open to twin native editions if that delivers higher performance or security. • Core features: biometric sign-in with MFA, calendar sync (Outlook & Google), real-time encrypted chat, role-based task boards, push notifications, and an in-app admin console. • A clean CI/CD pipeline, automated tests, and store-ready builds are part of the deliverable set. Deliverables 1. Wireframes and an interactive prototype for sign-off 2. Production-ready code for both operating systems 3. Test suite plus CI/CD scripts 4. App Store and Play Store submission packages 5. Thirty-day post-launch bug-fix window Acceptance Criteria • Passes App Store and Play compliance reviews • Cold-start under two seconds on current flagship devices • No critical items on the OWASP Mobile Top 10 If you believe a PWA or desktop companion could add strategic value, feel free to outline it, but the initial milestone must cover the mobile productivity core. Include the main framework you propose—Flutter, React Native, Swift/Kotlin, or another—so I can align internal review resources accordingly.