Designed and developed a cross-platform fitness coaching app with live workout telemetry, customized nutrition engines, and community leaderboards.
1. The Engineering Challenge
The client needed a frictionless mobile application capable of tracking biometric workout metrics with zero audio/video playback lag across varying network conditions.
2. The Architectural Solution
Built a 60fps Flutter cross-platform mobile client with offline-first SQLite cache, background audio mixing, Apple HealthKit / Google Fit integration, and gamified social challenges.
3. Measured Real-World Impact
- 50,000+ verified active downloads within the first 90 days across iOS and Android
- 4.9 Star average rating across both iOS App Store and Google Play Store
- 74% 30-day user retention rate driven by personalized workout milestones and push streaks
- Real-time heart rate sensor telemetry syncing with sub-50ms latency over Bluetooth LE
