osaring sizer

This is a Ring Size Measurement Android app. Key features include: 1. Ring Size Measurement (Core Feature) - Ring Mode: Place a ring on screen and adjust the circle to match; uses screen calibration for mm-level accuracy - Finger Mode: Place your finger on screen to measure; supports left/right hand switching with finger visualization and directional arrow guides - Precise diameter adjustment via slider, automatic circumference calculation, mapped to US ring sizes (4–16) - Smart recommendation: auto-suggests sizing up when measurement is near a size boundary 2. Measurement Results & History - Dialog showing measurement results (size label, diameter, circumference) with wearing advice - Logged-in users can save measurements and view history 3. Ruler Tool - Full-screen vertical ruler with mm/cm unit switching, calibrated based on screen DPI 4. Articles - Browse ring-related knowledge articles (list + detail view) 5. Customer Service Chat - Real-time WebSocket-based chat with text and image support, unread message badge 6. User System - Sign up, login, and forgot password flows 7. User Guidance - Onboarding screen for first launch, video tutorials for ring and finger measurement 8. Others - Feedback submission, contact us, privacy policy, terms of use, settings page