I want to develop a Live Voice Chat Android App similar to Hoob with smooth UI and real-time performance. IMPORTANT: The app must be fully functional and testable on my side before any milestone release. Core Requirements: - Real-time voice chat rooms (low latency) - Public rooms (open for all users) - Private rooms (invite-only) - Topic-based rooms (categories) Authentication: - Email & password - Phone number OTP - Google login Facebook login Backend: - Firebase integration (Authentication + Realtime Database/Firestore) - All user actions must reflect instantly in Firebase Testing & Verification (STRICT): - Developer must provide LIVE testing proof - Screen recording must include: - Current date & time - Real device testing (not old recording) - Full app flow (login → room join → data update in Firebase) - I will also test APK on my Android device NOTE: - No fake or old recordings will be accepted - Payment will be released only after proper verification I am looking for a serious and long-term developer.