I have used this app earlier so I am eligible to share my experience
Pros :
Quality of teaching is good
There are good educators like jatin verma who have appeared for upsc cse exam. Ayush sanghi sir is one of the best economics teacher. Mrunal patel sir has also launched his courses which plays an important role in civil service examination . These are some of the well known educators on unacademy
Video provides beautiful presentation with limited span of time
There are various courses which gives the opportunity to audience to learn about various topics.
Cons :
Various content for single topic which make audience unable to make choices
Incompletion of courses. It is one of the worst thing about unacademy
Unacademy is one of the best app but there is a scope for improvement. Coming to administration. It is quite good. There is hardly any error while operating on this app. It is user friendly. User interface is excellent.i recommend you to use this app.I hope this review helps you.