Blood Tracking and Donor Management System (BTDMS) is an advanced cross-platform mobile application used for updating blood administration for specific patient and in cruciality reporting of adverse reaction during the blood transfusion to the central system. In essence, the purpose of this app is to keep log of blood administration of the blood recipients and to report any reactions occurred during blood transfusion to the central system. This app is intended to be used by registered hospital personnel associated to a specific hospital and having a registered NMC/NNC number.