ApexCross-PlatformMobileWorkout&CoachingApp
A high-performance React Native iOS and Android app featuring offline workout logging, biometric health sync, and live session streaming.
Apex Mobile brings personal coaching and custom workout progression directly to members' pockets. Synchronizes seamlessly with Apple HealthKit and Google Fit while caching exercises for offline gym usage.
The challenge
Gym environments frequently have poor cellular reception. The app needed 100% offline logging for sets, reps, and workout timers with automatic conflict-free synchronization upon reconnecting.
The solution
Engineered with React Native and WatermelonDB for local SQLite persistence. Built an idempotent sync protocol with Node.js / Express and MongoDB. Integrated Apple HealthKit and Google Fit APIs.
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Offline-First Local SQLite Engine
Members can log full workouts in basement gym facilities with zero internet connection.
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Apple HealthKit & Google Fit Sync
Automated resting heart rate, calorie burn, and step count telemetry ingestion.
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Interactive Video Exercise Library
High-definition cached video demonstrations with form guidance and angle analysis.
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Push Notification Reminders
Customized workout consistency nudges powered by Firebase Cloud Messaging (FCM).