In this crucial first milestone, we'll lay the groundwork for your successful app. We'll deliver a fully interactive prototype built in Flutter, allowing you to experience the core user flow and key features firsthand. This isn't just a static design; you'll be able to tap, swipe, and navigate through the essential screens. This milestone also includes the implementation of core features, e.g., user authentication, data loading from an API, core calculation logic. This ensures we're aligned on the vision early on and provides a tangible demonstration of progress. You'll receive the prototype, access to a private code repository (if requested), and a detailed progress report. This approach minimizes risk and allows for early feedback, ensuring we build exactly what you need.