Abstract The present study aimed at investigating the effectiveness of using Flipgrid application in developing the EFL pronunciation skills of second year English Education major student teachers and reducing their EFL communication apprehension. Instruments of the study included: an EFL pronunciation skills checklist , an EFL pronunciation skills test, a rubric to score the test and an EFL communication apprehension scale. The study adopted the quasi-experimental design. Participants of the study were seventy male and female student teachers from second year English Education major, Faculty of Education, Mansoura University. Two intact microteaching groups were assigned: one with 35 student teachers trained using Flipgrid (the experimental group) and the other with 35 students trained using traditional methods (the control group). Results revealed that Flipgrid  application had a significant effect on developing student teachers' EFL pronunciation skills and reducing their communication apprehension. It was recommended that Flipgrid application should be utilized for improving students' EFL pronunciation skills and other language skills in different stages. Key words: Flipgrid application, EFL pronunciation skills, EFL communication apprehension