Last night, after I posted a screenshot of Groupon’s stock price from my iPad, some people asked me which app I was using. It’s actually my favorite iOS app, StockTouch.
After I wake up every morning, I grab my iPad and open StockTouch. The first screen I see is an overview of the top 900 US stocks by market cap, split by sector:
This is an incredibly powerful data visualization; it gives an at-a-glance view of the entire market’s health. It also facilitates quick exploration. Touching a sector zooms in to just those companies:
And touching a stock zooms in to the company overview:
The UI is gesture-based, so it’s easy to quickly pan around and get a feel for what is going on with the market at any given interval. You can also change the ordering of the...