meta name="apple-mobile-web-app-capable" content="yes" Element
meta Element for Bookmarked Sites
If a user has added your web application to their springboard, the following meta element can remove the top bar from the browser:
<meta name="apple-mobile-web-app-capable" content="yes" />
And that’s all! The address bar is hidden until the user swipes down near the top bar of the application. With the address bar hidden, your web app can look just like a native app!