I’m planning to build a mobile productivity tool focused solely on task management and to release it simultaneously on iOS and Android. The first milestone is a clean, intuitive interface that lets users create, prioritise, and track tasks, with push-notification reminders and offline access that syncs when a connection returns. Calendar integration and broader collaboration tools can wait for later versions; right now I want a rock-solid core experience. End-to-end delivery is essential. That means UX research, wireframes, polished UI that follows each platform’s design language, the complete codebase (Swift/Kotlin or a high-quality framework such as Flutter or React Native), an API layer if you decide server sync is best, and fully tested release builds ready for the App Store and Google Play. Deliverables • Approved wireframes and final UI designs • Well-documented source code and project files • Tested, release-ready iOS and Android builds • README with clear setup, build, and deployment steps Acceptance criteria: smooth task CRUD operations, background and offline functionality with reliable sync, timely push reminders, and zero critical bugs in QA. Share your preferred tech stack, indicative timeline, and any prior examples that prove you can hit these marks.