Would you like your website
- to feel like a native app (without writing one)?
- to appear on the user's Android homescreen?
- to start full screen (rather than in a browser)?
If so, this simple page will generate the manifest file for you to put on your server to make it happen in Chrome and Opera for Android (and soon Firefox). (More about the web manifest format, and download Opera for Android to try it out.)
Once your manifest is ready, why not validate it?