Hey Adam - There might be an app out there that could take a screenshot of the full page, however the easiest way to share the page is to temporarily publish the page under a alternative URL such as unbouncepages.com/secretpageurl25. They can then see the actual live page and interact with it. Whenever your ready you can then unpublish the page or take it live on a different URL.

Hey Adam! I thought I’d chime in and add to Johnny’s helpful points. If you’re after an app that will capture a screenshot of the entire preview page, check out "Awesome Screenshot. I use it almost on the daily when helping customers!