"Add To Favorites" Button For WordPress?

wordpress

#1

I’m trying to add an “add to favorites” button for a WordPress page. In theory the user (on mobile) will click on the button and it will add the site to their “favorites” on their mobile homepage.

Here is an article I found on the subject:

There has to be an easier way though to add this button to WordPress. Does anyone know of a plugin that could achieve this?