Byjus is an online educational platform. They have app for Android and iOS both. It is a pretty well made app. The interface looks appealing.
They offer video lectures. They cover only syllabus upto class 12th so you won’t find anything of your use if you are a college student, but sure you can learn some old concepts.
I used to watch lectures on byjus on my school time which is 3 years ago.
Video lectures are really impressive. Their way of their teaching is different from old school method. They use animations for making you understand a concept. The way they teach is amazing.
The thing which is not so good is that you only get to watch only a few lectures for free. If you want the complete courses you will need to buy them. The courses are not too expensive but they definitely cost you money.
Its a pretty good app. If you are studying in school then you should definitely try it once, you might like it.