app/views/shared/_apple_touch_icons.html.erb
<!-- apple touch icons -->
<%= tag("link", rel: "apple-touch-icon", href: asset_pack_path('media/images/apple-touch-icons/apple-touch-icon.png')) %>
<%= tag("link", rel: "apple-touch-icon", sizes: "57x57", href: asset_pack_path('media/images/apple-touch-icons/apple-touch-icon-57x57.png')) %>
<%= tag("link", rel: "apple-touch-icon", sizes: "72x72", href: asset_pack_path('media/images/apple-touch-icons/apple-touch-icon-72x72.png')) %>
<%= tag("link", rel: "apple-touch-icon", sizes: "76x76", href: asset_pack_path('media/images/apple-touch-icons/apple-touch-icon-76x76.png')) %>
<%= tag("link", rel: "apple-touch-icon", sizes: "114x114", href: asset_pack_path('media/images/apple-touch-icons/apple-touch-icon-114x114.png')) %>
<%= tag("link", rel: "apple-touch-icon", sizes: "120x120", href: asset_pack_path('media/images/apple-touch-icons/apple-touch-icon-120x120.png')) %>
<%= tag("link", rel: "apple-touch-icon", sizes: "144x144", href: asset_pack_path('media/images/apple-touch-icons/apple-touch-icon-144x144.png')) %>
<%= tag("link", rel: "apple-touch-icon", sizes: "152x152", href: asset_pack_path('media/images/apple-touch-icons/apple-touch-icon-152x152.png')) %>
<%= tag("link", rel: "apple-touch-icon", sizes: "180x180", href: asset_pack_path('media/images/apple-touch-icons/apple-touch-icon-180x180.png')) %>