I’m planning a straightforward Android app whose first and only core feature is user registration—sign-up, sign-in, and secure session handling. I don’t need an iOS build or any payment or social-media modules at this stage; the entire focus is on getting a clean, production-ready Android experience in place. Here’s what I have in mind: a modern Kotlin codebase built with Android Studio, Material You UI components, and a lightweight yet secure back-end solution (Firebase Authentication, Supabase, or a custom REST API—whichever you’re most comfortable with and can document clearly). New users should be able to create an account with email and password, receive basic validation feedback, and then log in to reach a simple “home” screen. I also want graceful error handling (e.g., duplicate email, weak password) and persistence of login state after the app is relaunched. Deliverables • Complete Android Studio project with clean package structure • Compiled release-ready APK for quick installation • Step-by-step setup notes covering how to connect the app to the chosen auth back end • Short README outlining key classes and how to extend the project in the future Acceptance criteria – User can register, verify credentials, and log in without crashes or warnings – Authentication flow meets Google Play Target API requirements – Code passes lint checks and builds with no errors in the latest stable Android Studio If this matches your expertise, let’s lock the scope and timeline so I can get the first build on my device soon.