Some cool stuff to make a website act more like an app on iOS. Full details here.
Specifying a Startup Image
<link rel="apple-touch-startup-image" href="/startup.png">
Hiding Safari User Interface Components (also adds it to the task bar like an app)
<meta name="apple-mobile-web-app-capable" content="yes" />
Changing the Status Bar Appearance
<meta name="apple-mobile-web-app-status-bar-style" content="black" />
Touch Icons
<link rel="apple-touch-icon" href="touch-icon-iphone.png" /> <link rel="apple-touch-icon" sizes="72x72" href="touch-icon-ipad.png" /> <link rel="apple-touch-icon" sizes="114x114" href="touch-icon-iphone-retina.png" /> <link rel="apple-touch-icon" sizes="144x144" href="touch-icon-ipad-retina.png" />
I include my apple touch icons based on what HTML5 Boilerplate has for included icons and what this guy says.
Icons listed from largest to smallest.
Include rel=”apple-touch-icon-precomposed” so that the reflective shine isn’t added to the image. If you want that reflective shine, don’t put it on there and rename your images: apple-touch-icon-(size).png.
I also prefer the naming scheme in boilerplate.
Also check out this App icon psd template.