We are building a social-driven e-commerce experience LIKE AMAZON . and now need the full mobile application delivered for both iOS and Android. The core account flow is phone-number registration with OTP verification; it must handle resend logic, basic fraud protection, and a smooth first-time user experience. Code may be written in Flutter, React Native, Kotlin/Swift, or another cross-platform stack you prefer—as long as both stores receive the same polished feature set and the final builds meet Apple App Store and Google Play requirements. Deliverables • Complete source code for iOS and Android builds • OTP-based authentication module fully integrated with a scalable back-end (Firebase Auth, Twilio Verify, or a comparable service) • Installation and configuration guide • A short hand-over session so my internal team can maintain future versions Acceptance criteria 1. Users can register, log in, and reset credentials via phone + OTP without errors. 2. The same feature set operates correctly on the latest two major versions of iOS and Android. 3. All screens pass basic accessibility checks and feel responsive on common device sizes. Once the above milestones pass review on TestFlight and internal Android builds, we will submit to both stores and close the project.