Ipad Icon and Favicon

In the header of your index page

<link rel="shortcut icon" href="favicon.ico" >
<link rel="apple-touch-icon" href="images/chop.png" />

 

The first is your favicon ( which you have made using the facicon generator)

and your ipad/ phone icon is 120pxX 20Px and is a png

https://developer.apple.com/library/ios/documentation/UserExperience/Conceptual/MobileHIG/IconMatrix.html