StockTouch

Keep track of the entire stock market using nothing but a glance with StockTouch ($5). This groundbreaking app for the iPhone and iPad uses advanced data visualization techniques to give you an idea of which stocks are moving up and which are falling, with plenty of options to adjust the time, market sector, and the ability to zoom in and out anywhere to get more information or a broader view. Of course, you can also create your own personal heat maps of stocks and ETFs, and the data automatically reloads once every 5 minutes throughout the trading day, so you're always up to date. A beautiful design doesn't hurt it, either.