To detect iPhone users on your sites, you can do so client-side or server-side.

Client-side (javascript):

if (navigator.userAgent.indexOf('iPhone') != -1) {
    /* iPhone user */
}

Server-side (example is PHP):

if (stristr($_SERVER['HTTP_USER_AGENT'],'iPhone')) {
    /* iPhone user */
}

For sites that use an MVC coding pattern where the programming logic code is separate from the template, the following example is useful:

if (stristr($_SERVER['HTTP_USER_AGENT'],'iPhone')) {
    $template = 'home/iphone.html';
} else {
    $template = 'home/index.html';
}

Category	Font name	Description	Example