Abstract : Education is an effort to influence individuals, groups, and communities to have knowledge that can be used to improve health status. In implementing education, learning media can be used, one of which is using an android application. Information on women's reproductive health, especially leukorrhea, is very important for women, especially pregnant women, because of the various effects. This study aims to determine the effect of education on increasing pregnant women's knowledge about leukorrhea using the Mapaccing application. This study used a pre-experimental method (one group pre-test and post-test design). The number of samples is 30 taken using the accidental sampling technique. In the first stage, the socialization of the use of the Mapaccing application was carried out for two days. The Mapaccing application is installed on their respective Android phones. The mother was then reminded to read and study the leukorrhea material every day for two weeks, with 10 minutes of studying/reading. Based on the research results, it was obtained that the pre-test value was 74.66 and the post-test score was 100, there was an increase in knowledge of 25.34%, with a P-value of 0.000 smaller than the value of α 0.05. Based on the results, it can be concluded that the Android-based Mapaccing educational media application increases the knowledge of pregnant women about leukorrhea.