Meta Tag "apple-mobile-web-app-capable" for Android?

Chrome on Android now supports a meta-tag mobile-web-app-capable:

Since Chrome M31, you can set up your web app to have an application shortcut icon added to a device's homescreen, and have the app launch in full-screen "app mode" using Chrome for Android’s "Add to homescreen" menu item.

For details about the mobile-web-app-capable meta-tag, scroll down to "Supporting homescreen-installed apps prior to M39":

Since M31, Chrome will look for the following meta tag in the element of the web-page (if there's a manifest with display specified, this is ignored):

<meta name="mobile-web-app-capable" content="yes">

The name attribute MUST be "mobile-web-app-capable" and the content attribute must be "yes" (case in-sensitive). If there is any other value in the content attribute the web app will be added as a regular bookmark.

While I don't have any devices running Chrome M31 that I could test with, I interpret this to mean that full-screen web apps, with an icon on the device's homescreen, are supported as far back as Chrome M31, provided you use that mobile-web-app-capable meta tag.

Since Chrome31+ home screen web apps are also supported on Android. See here.

I don't believe so.

However, it would be fairly trivial to detect if a browser is an Android device, and show a link to a Android Market app (or directly to the APK)

As Android has a WebView widget, it's pretty trivial to write an app that loads a dedicated website, or that somehow wraps offline content (either downloaded at first-launch, or shipped in the assets folder)