Is WeGrowNepal really free, or is there a catch?

It is free, and the honest version of why is worth saying: the notes are donated by students, the platform is built and paid for by Lacspace Corporation Pvt. Ltd. as something it wants to exist, and there is no advertising anywhere in the app or on the site.

There is no plan to put reading behind a payment. If that ever changed, it would change for new material and never retroactively for notes people donated on the understanding they would stay free.