Physics is a subject that is quite difficult among students. in physics itself there are many theories and formulas that are difficult to memorize because they are almost similar to one another. to overcome so as not to forget the story that has been memorized is to read it continuously. but bringing books everywhere will make it difficult for ourselves. now it's enough just to bring your cellphone so you can learn middle school physics anywhere. perfect for those of us who are facing junior high school exams.