Sales are great, but we really like to know about device use. You can sell as many devices as you like, but if nobody uses them, it’s a short-term gain. Apple is great on both ends of that spectrum, and have announced their total App Store downloads, and they’re pretty surprising. Compared to this time last year, cumulative apps sold has a nearly 50% increase. That’s pretty significant for a single year, considering the App stores have been around for years.