I've been looking at App Store ranking tools, and I'm interested in making a rank tracker for my own use, but I'm hitting a wall to match the scope of what some of the online services have available.
To be specific, services like Applyzer and App Annie are able to pull the Top 1000 in each category in every store worldwide. How can we get to that data? The only real source of the ranking data I can find from Apple is the Top 300 for each category & store, through their RSS feeds. I'd love to be able to poll the rankings more often than once a day (App Annie), and I don't want to pay per app per month for Applyzer Pro to get hourly updates (and that's limited to 10 stores only).
I can't imagine they're going brute-force scrapes of the store itself to get this info, but it's hard telling sometimes.
Any idea how to access the Top 1000 by category by store?