It is an organization, where many people are working.
this provides All type of tutorials. like civil service, cat, mat, school exam etc.
it provides all type of question set and giving all type of tutorials.
they also provides all the hard copy of notes.
It has an android application. in that, it contains a lot of videos and pratice questions set.
Now a days it growing more and more and giving the ideas how to read and learn a lot.
In myopinion youcan learn a lot from this application, go ahead and download this application and learn more thing from this.