Hello friends, today I introduced a very nice study portal app or website. I used this app for 2 month. It is UDEMY app. My best recommendation to study online. Here you can get all types of courses you want. They provide you video lectures. And the best thing is that, if you enrolled any course, that you used for lifetime. And it provides very nice interface that attracts any student and good customer care service.
Here I provide some images of my udemy account check this out.