The Soundboard can easily be bookmarked in mobile versions of the Chrome browser. First, visit the Soundboard link you'd like to bookmark.

Once there, click the three dots at the top right of the screen.

Once you get the pop up, click the star at the bottom to bookmark the page.

To revisit bookmarks in Chrome, simply hit the three dots at the right, then hit Bookmarks.

The Soundboard is probably in Mobile Bookmarks, unless you intentionally put it in another folder.

Tap that folder to see your list of bookmarks.

In this case, we've added the Business Professional Soundboard.  Yours will have a different name.  In any case, it's there for quick access now!