The Dairy Farming App enhances traditional livestock trading by offering a secure, transparent, and user-friendly digital platform. Built with Android Studio for the frontend and Java for backend integration, the app facilitates direct interaction between farmers, veterinarians, and buyers, reducing reliance on intermediaries. Its core functionalities include real-time messaging, location-based listings, livestock health record management, and IoT-driven herd monitoring. Comprehensive testing ensured the app meets functional, UI/UX, and security standards, achieving a 95% success rate in transaction completion. This paper explores the app’s development, implementation, and its transformative impact on modernizing livestock management through innovative technology.