Case Study VitalTrack – Wearable Biosensor & Cardiac Remote Monitoring App (USA)

Project Overview

FDA-aligned iOS and Android mobile app pairing seamlessly with Bluetooth LE cardiac sensors to detect arrhythmias and alert emergency clinicians in real-time.

Client & Location

CardioWave Medical Systems
Location: San Diego, California, USA
Industry: Medical Devices & Mobile Health

Challenges

• Continuous Bluetooth LE background connection drops on iOS due to aggressive battery management.
• Streaming 250Hz raw ECG sensor packets without draining mobile battery.
• Need for reliable background alerts even when the user’s phone is set to Do Not Disturb.

Solution

Built a native C++ bridging module inside a Flutter core, implementing efficient byte buffering, hardware-level CoreBluetooth reconnection protocols, and Apple Critical Alerts.

Technologies Used

• Flutter 3 & Native Swift / Kotlin Bluetooth Bridging
• Apple Critical Alerts & Android Priority Notification Channels
• SQLite Local Database with AES-256 Encryption
• AWS IoT Core & MQTT Over TLS

Results & Business Impact

• Bluetooth background connection reliability improved to 99.8%.
• Battery consumption optimized to less than 3.5% per 12 hours of continuous ECG telemetry.
• Directly assisted in detecting 42 acute cardiac events early, saving lives.