How To collect iPhone App information

Question

There are some apps that introduce other popular applications. I'm really surprised that when I change the cost of my application, the introducing app shows the new cost of mine really quickly.

How can this be possible? Is the developer collecting the data by hand, or is Apple providing all the information of their apps on the web somewhere?

Answer 1

Check out the Affiliate Search API. Here's their example for the Yelp app, which includes a JSON parameter for price:

{
   ...
   "price":0.00,
   ...
}