I want to transform a clear-cut productivity concept into a smooth, reliable mobile experience delivered on both Android and iOS. The full cycle—design, build, test, and store submission—should come together under one roof, ideally through a shared codebase such as Flutter or React Native so users on either platform enjoy the same speed and polish. What I need • A clean, modern interface that feels native on each platform. • Secure, cloud-based user accounts to keep data in sync. • Well-documented, maintainable code stored in a private Git repository. • Integrated analytics, crash reporting, and an in-app feedback channel. • Step-by-step guidance through Google Play and App Store review, including screenshots and release notes. Deliverables 1. Clickable UI prototype (Figma or similar) approved before coding starts. 2. Production-ready Android (AAB) and iOS (IPA/TestFlight) builds. 3. Complete source code with build instructions. 4. One month of post-launch bug-fix support. Acceptance criteria • App passes both store reviews. • No critical or high-severity crashes in the first 100 live sessions. • All user-visible text free of spelling or grammar errors. If you have a track record of shipping productivity apps, please share store links and outline the tech stack and timeline you’d use for this project.