Hey friends Unacademy is a great platform for students and teachers both. This is made by Roman Saini ( 2013 batch IAS) . But he left his job to provide education by Unacademy.
There are many courses you can study here without any fees and coaching classes. like Bank, ssc, railway, gate etc and if you are preparing for civil service this is the best guidance platform.
You can study by apps, website and by youtube videos in english or hindi languages. There are many professional teachers here provide you concept and notes omline help.