BloodLink: A Mobile Application for Emergency Blood Donor Finder

Emergency medical cases often suffer delays because information about potential blood donors is scattered, outdated, or difficult to verify quickly. To address this gap, this work introduces BloodLink, a lightweight mobile solution designed to reorganize the blood-donor ecosystem through structured digital coordination. Instead of relying on static records, the system continuously updates donor availability, manages request authenticity, and prioritizes nearby contributors through an integrated location engine. The application is built with a cross-platform Flutter environment, while Firebase services handle authentication, data consistency, and event-driven alerts. A controlled donor-cooldown cycle maintains safe donation intervals, and an administrative screening module ensures that only legitimate requests enter the system. By merging live data handling with a simplified interaction model, BloodLink enhances responsiveness and strengthens the reliability of emergency blood sourcing in diverse field conditions.