PawTracker is a complete IoT ecosystem: a compact, firmware-optimized wearable GPS tracker, native mobile apps and a Next.js web dashboard with Firebase for real-time telemetry. Features include precise location, geofencing, activity and health analytics, offline data caching, battery optimization, OTA updates and secure auth. Outcome: scalable deployment (>10k devices), 99%+ tracking accuracy, extended battery life, high user retention, streamlined vet integrations, push alerts and exportable health reports for owners and clinicians.