Byjus is an online learning site/app for students and for those who are preparing for competitive exams such as CBSE, ICSE, CAT, IAS, GMAT, GRE, JEE and NEET. Anyone can learn from here
Byjus site/app has a very great UI experience in mobile/desktop. Students can learn easily from this site without any problem.
My experience with this site/app is quite average. I used to learn from Byjus when I was in 12th standard. The topic explanation in every video is very precise by teachers and easy to understand for students. And there is some online test that they provide for practice.
One drawback is that some video tutorial is paid and is not free.
Overall experience is average but for students, it is helpful to practice before preparation for any competitive exams.