[mkl]

The rules are here (linked at the top of the Show HN page): https://news.ycombinator.com/showhn.html

I agree it's likely the sign-up barrier, but also the button says "Open the web app" and then it doesn't open the web app.

You can email the mods for advice/info on this sort of thing (Contact link at the bottom).

[mistakevin]

Does "Open the web app" not just redirect you to https://app.notebooker.ai?

[anon0834]

No, it redirects to a sign up / login page.