How to hide the nav bar on a specific page

I have a ‘Download the App’ page where I want users to simply download the app and avoid anyone clicking on any other links. I’m trying to hide the nav bar on this page only, but having a hard time removing the nav on this page without affecting the other pages.

Can someone please walk me through how to hide the nav bar on a single page without removing on all other pages?

Thank you.

Here is my site Read-Only:

Just select it and push delete. it’ll remove the element from that page only

If I do that, it actually deletes the nav on all pages. How do I ensure it only removes it on this single page and stays on all others?