Prepare for JEE Main Online with EIf you are preparing for the joint entrance exam then you should download this app and start your preparation with this app which has all the benefits that will help you ace the exams. The new IIT JEE test prep app by Extramarks helps you prepare for the exams with the help of its new features. If you are preparing for the joint entrance exam then you should download this app and start your preparation with this app which has all the benefits that will help you ace the exams. The new IIT JEE test prep app by Extramarks helps you prepare for the exams with the help of its new features.