Meritnation is an awesome resource to study anytime anyplace.
It has all the study material for my cousin’s class 9 Maharashtra Board. In addition to textual content they have really nice animated videos to explain concepts & build foundations.They also have sample papers & practice questions which are very helpful in prepping for exams.
My cousin uses them on his laptop as well as his android phone using their app. He says Meritnation has replaced his entire bag full of books with one simple application on the phone:)