The Finance section of the App Store does feature some heavy-hitters (Bloomberg, ATM Hunter) and some fairly weak beer too. A lot of these apps are unitaskers, particularly when it comes to stock quotes and charting. For a full-featured and free investment information portal, and a strong competitor to the Bloomberg iPhone app, you may want to try the newly-released AOL Daily Finance, powered by the dailyfinance.com site.
The first key feature to note is the free real-time equity quote service, provided from the BATS Exchange; major exchange (NYSE & Nasdaq) quotes are delayed, though. You can quote individual symbols or watch your entire portfolio with ease, whether you enter it on the device or link to your existing lineup under your AOL or AIM screenname; up to 25 separate portfolios can be managed. You can also view up-to-the-minute financial and market news from the AP and other sources.
The other standout feature of this app is its comprehensive charting support. Clicking the chart button on an equity page brings up a straightforward chart, but rotate your device into landscape mode and you're in a Cover Flow-esque lineup of all the charts in your portfolio. Double-tap a chart to access a full suite of advanced comparison options (vs. markets, vs. peers, seasonality, showing events like earnings & splits, and custom symbol comparisons). Holding down a finger on a single-line chart enables a crosshair cursor that lets you see the specific data for any point on the chart. All the functions are intuitive and easy to use; the charts are cached so you can see most of your data even if your device is disconnected from WiFi or cell service.
If you're of a mind to keep an eye on the markets while you're on the move, you may find this app has the tools you're looking for. Check out the gallery below for a few screenshots.