I want a lightweight Android application that lets new users register, returning users sign in, and everyone manage a personal profile stored locally (SQLite or Room) or in a lightweight cloud back-end—whichever you feel suits a small-scale first release. The interface must be modern, uncluttered, and responsive on current Android phones and tablets. I am aiming for a two-to-three-week turnaround and have set aside $100–$300, scaled to the polish and stability you can deliver. Please base the build in Android Studio using Java or Kotlin and follow current Material 3 guidelines so the project is easy for me to maintain later. When you respond, focus on your relevant Android experience: tell me which similar login/registration apps you have shipped and how you typically handle user-profile persistence. A short note on your proposed tech stack and timeline is all I need to green-light the work. Deliverables • Signed APK (or AAB) ready for Play Console upload • Full, well-commented source code and Gradle project • One-page setup/readme so I can build and run locally I will release payment in two milestones: 40 % on receipt of a working login/registration flow, 60 % on final submission passing a quick smoke test on my end. Let me know if anything here needs clarification—otherwise I’m excited to see how you’d tackle this.