in5min: Gamified Habit Building App

I developed a comprehensive gamified habit building platform addressing all engagement and technical requirements: **React Native + Expo SDK 54** Built the application using React Native 0.81 with Expo SDK 54 for modern cross-platform development. Achieved native performance across iOS, Android, Mac, and Vision Pro with shared codebase and platform-specific optimizations. **Gamified XP & Leveling System** Implemented a sophisticated XP system with multiple earning mechanisms: base task completion XP, streak bonuses (increasing with streak length), Early Bird/Night Owl time-based multipliers, and a 10% chance for Double XP. Users level up through XP thresholds, unlocking new features and badges. **8 Badge Achievement System** Created 8 distinct badges to reward different play styles: Starter (first steps), Disciplined (consistency), Deep Diver (category mastery), Explorer (variety), Team Player (social engagement), Morning Person (early completion), Centurion (100-day streak), and Month Master (monthly perfection). **Puzzle Progression System** Designed a unique puzzle mechanic where completing habits earns puzzle pieces. 10 themed puzzles (Sunrise, Ocean, Forest, Galaxy, etc.) provide visual progression and collection satisfaction beyond traditional progress bars. **Comprehensive Social Platform** Built full social features including friend discovery and tracking, 4 duel types for head-to-head competition, team creation with up to 10 members, real-time group chat, and multiple leaderboard categories (daily, weekly, all-time, friends, global). **Daily Challenge System** Implemented 4 rotating daily challenges: Morning Rush (complete 3 tasks before 9 AM), Focus Master (single category deep dive), Speed Demon (complete tasks quickly), and Variety Master (tasks across different categories). **Mini-Games Integration** Integrated 5 cognitive mini-games as rewards and engagement boosters: Memory Match (card matching), Quick Math (mental arithmetic), Word Scramble (vocabulary), Reaction Test (reflexes), and Pattern Memory (sequence recall). Games award bonus XP and unlock at certain levels. **AI-Powered Coaching** Integrated AI recommendation engine that suggests habits based on current mood, time of day, recent completion patterns, and stated goals. The AI coach provides personalized encouragement and identifies patterns in user behavior. **Firebase Backend** Leveraged Firebase Auth for secure authentication, Firestore for real-time data synchronization across devices and social features, and Cloud Functions for server-side logic like leaderboard calculations and challenge evaluation. **Zustand State Management** Used Zustand for efficient client-side state management with React Query for server state synchronization. This combination provides instant UI updates with background data sync. **RevenueCat Monetization** Integrated RevenueCat for premium subscription management with in-app purchases. Premium features include unlimited habit tracking, advanced analytics, exclusive puzzles, and ad-free experience. **React Native Reanimated** Implemented smooth 60fps animations throughout the app using React Native Reanimated for level-up celebrations, streak animations, puzzle completion effects, and gamification feedback.