International Journal of Scientific Research and Engineering Development

The BMI Tracker is a web-based health monitoring project designed as a lightweight yet powerful academic system to support health awareness among individuals. Unlike simple calculators, this project integrates secure login, real-time database storage, history tracking, and visualization of BMI records using Chart.js. The project uses HTML, CSS, JavaScript, and Firebase to create a responsive and privacy-friendly tool. This paper describes the motivation, design, requirements, implementation methodology, results, and prospects of the BMI Tracker. The system is designed with a privacy-first approach, ensuring that user data is securely stored and accessed only through authenticated sessions. It is lightweight, cost-free, and cross-platform, making it accessible to students, professionals, and general users alike. The project demonstrates the potential of modern web development in healthcare by integrating real-time data handling, visualization, and security in one application. This research lays the groundwork for further development, including wearable integration and AI-driven health recommendations.