JavaScript var ua = navigator . userAgent . toLowerCase ( ) ; var isAndroid = ua . indexOf ( "android" ) > - 1 ; //&& ua.indexOf("mobile"); if ( isAndroid ) { // Do something! // Redirect to Android-site? window . location = 'http://android.davidwalsh.name' ; } PHP $ua = strtolower ( $_SERVER [ 'HTTP_USER_AGENT' ] ) ; if ( stripos ( $ua , 'android' ) ! == false ) { // && stripos($ua,'mobile') !== false) { header ( 'Location: http://android.davidwalsh.name' ) ; exit ( ) ; } .htaccess RewriteCond %{HTTP_USER_AGENT} ^.*Android.*$ RewriteRule ^(.*)$ http://android.davidwalsh.name [R=301]