Has anyone used Nurostudy for secondary school revision support?

[Najneedshelp]

Has anyone used nurostudy.com and what are your thoughts? It seems to have flash cards, quizzes, study help would you recommend

A friend mentioned and said it was dire and not to bother. In fact her son’s school had specifically said avoid.

Would love to know what specifically was dire about the app as have started free trial and can't see anything "dire".

Are you advertising it OP?