The app is very helpful for learning. sometimes practicing wont help unless and untill the concept is explained deeply and properly. I have gained a lot of knowledge from the app and its really very informative. its an app which lets me understand the topics I have missed in my college and coaching classes. the teachers are awesome and explains so well. its a great app to explore anything and I would really like to thank the developers of the app. I would recommend everybody to use this app. for learning purpose it is the best app.