A Real-Time Android Based Blood Donation Platform for Emergency Donor- Patient Matching Using Firebase Firestore, One Signal Push Notifications, and Gemini AI

Blood donation during emergencies is still not managed properly in many developing countries. In India, there is a shortage of nearly 4 million units of blood every year, and because of this, many deaths that could be prevented still happen. In this work, am Android application is used as a solution. It is developed using Kotlin along with Firebase Cloud Firestore, Firebase Authentication, One Signal push notification services, and the Gemini AI REST API. The main purpose of the application is to reduce the gap between donors and patients by sending instant notifications to registered donors, usually within 1–3 seconds after a request is created. Some important features of the system include: (1) a Firestore snapshot listener-based dual badge notification system that works even without push notification permissions; (2) a self-notification prevention method using one Signal send Tag and filters JSON; (3) a REST-based AI integration approach to avoid Gemini SDK issues; (4) a MyRequestsFragment section for tracking personal requests; (5) a Firestore security rules setup for managing access; and (6) a dual-toggle system to control donor visibility. Testing was done on Android versions from Android 7.0 (API 24) to Android 16 (API 34), and all test cases passed successfully, showing stable and reliable performance.