If the app is out there now. Can you tell us which one it is? Perhaps all the people on HN with iPhones can donload it and check it out. I'm not going to say so

If the app is out there now. Can you tell us which one it is? Perhaps all the people on HN with iPhones can donload it and check it out. I'm not going to say something simplistic like: "Competition is validation" but I'd love to see what your idea was.