iNS is no longer under development. The app worked by parsing the HTML returned from newschoolers.com. Because the site changes so frequently, it was too difficult to keep up w/those changes. NS wants you to use their mobile site.
It's not that you can't ski ice. It's that you can't ski and the ice proves it.
iNS, Newschoolers for the iPhone - http://itunes.apple.com/us/app/ins/id343730245?mt=8