I am using this app but it is not working properly. This app has a nice content but it donot give all it content to the normal user , it gives all it content to the user who has subscribed this app. It has a nice knowlegde content but it takes a lot of net while working. It absorbs more than 1gb net while watching 2 videos only which is very bad. Nice all but donot likd by everyone. It should improve its content for normal users also.
My prefer to you: - I recomend you to study from books and take help from youtube and google which is best.