This app is very nice app there is no doubt that study in this app is very effective we can study and we can understood anytime any topic if we are not able to understand at first time then we can see this video second time without hesitation and there is also available a test series so we can guess our response and I want to say that this app is not for those students who are not interested study and they are interested only games if students will study by interest then there is no mean to use this app so this app helps them who hesitates with teachers.