The NLM Malaria Screener is a mobile app developed by the U.S. National Library of Medicine to support the diagnosis of malaria through automated analysis of blood smear images. It uses smartphone microscopy and machine learning to detect malaria parasites in thin blood smears, helping health workers and lab technicians—especially in low-resource settings—screen for Plasmodium falciparum infections. The app is intended for research and educational purposes and aims to enhance diagnostic accuracy where access to expert microscopists is limited. It provides results quickly and can assist in training or field screening, but it is not approved for clinical use.