Is the graphing portion of Apple’s “Stocks” iPhone application available to developers?
My guess would be that it is not. If I am right, on a rough scale on 0-100, how difficult would it be to reproduce? (I know this is a silly question, but anyway. Just want some idea.) Also, what framework do you think would be the most suitable for the reproduction? Core Animation? Notice especially how you can drag your finger across the charts when in landscape mode to see the prices on each data point. It’s just way too cool.
http://code.google.com/p/core-plot/ is probably what you’re looking for.