• Shipped and published a cross-platform personal finance app (Android APK v1.0.1 via EAS Build) with transaction management across 15+ categories, 5-screen analytics dashboard with 3 chart types across Weekly/Monthly/Yearly views with pie charts and heatmaps. • Engineered a full gamification system — daily login/activity streaks, 6 unlockable achievement badges (Early Bird, Budget Master, Super Saver, Night Owl), Silver rank progression, and interactive achievement toast notifications. • Implemented Savings Goals with real-time progress tracking, calendar-based Spending Heatmap, push notifications, biometric authentication, and complete auth flow (Clerk Expo) including Forgot Password.