The New York Times took a look at the Explore 9/11 free iPhone app, downloaded 100,000 times, which contains a guided tour around the perimeter of the World Trade Center site,
narrated by the people who lived through that day.
The Times says that because the app resides on a small phone and features people speaking plainly about their experiences, it feels personal, and therefore powerful. "Instead of reading quotations inscribed in granite, you are
listening as someone whispers them in your ear while you cradle the
phone and strain to hear."
Explore 9/11 has an interactive timeline and a map with
photographs submitted by ordinary citizens and displayed, via
GPS, according to their proximity to the spot
where the user is standing, but The Times says these features are "less successful," than the tour.