iPhone WebApps, is there a way to detect how it was loaded? Home Screen vs Safari?

Question

I have an iPhone Web App, and I\'m interested in detecting if the app was loaded either from:

1. iPhone Safari
2. iPhone installed web app (via the add to m

Answer 1

This is what I use, works great:

if (window.navigator.userAgent.indexOf('iPhone') != -1) {
    if (window.navigator.standalone == true) {
        alert("Yes iPhone! Yes Full Screen!");
    } else {
        alert("Not Full Screen!");
    };} else {
        alert("Not iPhone!");
        document.location.href = 'please-open-from-an-iphone.html';
};