i am developing a commercial (mobile iPhone/android) app that will need to call an api for prior day close information. I talked to xignite and they offered unlimited access to this historical data but they wanted 5K per year - not really affordable for an app that will be free and most likely not generate any income. Anything suggestions? Iqfeed? Active tick? As I only need closing price was hoping there would be a more affordable alternative. The "commercial" aspect is adding to the price but I see lots of apps on the App Store that display 15-20 min delayed data....where do those apps get their data? I know all of these .99 apps are not paying 5k per year....