NLM Malaria Screener is a diagnostic app that assists users in the diagnosis of malaria and in the monitoring of malaria patients. The app counts infected and uninfected red blood cells in blood smear images captured by the smartphone camera when attached to the eyepiece of a microscope. It uses image analysis and machine learning methods to identify individual cells and discriminates between infected and uninfected cells. The app reports the detected parasitemia to the user and stores it in a p