Awesome share and add-on. This add-on is very simple, but very helpful for returning visitors on the mobile device. This should be implemented within XF Core since so many people are using mobile technology these days.
I do believe the mobile view count and users will continually grow and be the primary inbound traffic within any website or page.
Awesome share man, it works perfectly and I would also agree with RobinHood to possibly add some simple usergroup permission.