Hello friend, The dronstudy is the best teaching app. Here you can learn in the easily wayes. It help all categories of student like it helpfull for average and good student both. All subject are categoris. Here you can learn the top class iit level physice, chamestrya and also biology with the base. The teachers are teaching by the help of videos.
In this app the every chapter notes are also avilable and it also very very important for all student. It teaching concept was very nice. It is very very usefull.
This I am using before 1 year and its very helpfull for me.
Thank you