Designed by the students of the Islamic Educational College, robotics team, this application is meant to help student of 10th and 11th grades to learn how to calculate the equivalent force on charges using Coulomb's Law. It guides them in steps through the whole calculation processes. Students can drag and drop charges to see how they attract or repel according to their type. Moreover, they can make calculations by substituting values in the law. All along, it gives students feedback of right and wrong steps. Finally students can check their learning by having a short test.