So AFAICT there's no reason this shouldn't be able to run in phones and tablets it's just that you have to start the audio in a touch event to get things starte

So AFAICT there's no reason this shouldn't be able to run in phones and tablets it's just that you have to start the audio in a touch event to get things started and the page doesn't seem to be doing that? Or maybe it's intentionally trying to encourage downloading the app?