Testbook is one of the online platform where you can prepare for the any of the competition exam like railways, bank jobs etc . The loading time of this app is very less and it gives the depth knowledge of each and every topic and subtopics in detail with sufficient number of example. Yoh can also give weekly test on this platform. I promise that you will find this app better than the other apps like this on play store. So I openly recommend you to use this app for your sure success in competition exam . Thanks!