Is it detect iPhone app price change?

One of my project need a function to detect the price change of the app in app store. Is it possible?

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Thanks

You can use the iTunes JSON API with the App ID to find the price. Here's an example for iMovie for iPhone:

http://ax.phobos.apple.com.edgesuite.net/WebObjects/MZStoreServices.woa/wa/wsLookup?id=377298193

You'll see that in data["results"][0]["price"] the price is $4.99.