Apple have quite the achievement today, announcing that they have had over 15 billion (that's 15,000,000,000!!) apps downloaded from their App Store by more than 200 million iOS-powered users worldwide. The App Store sports 425,000 apps and developers have created an incredible array of over 100,000 iPad-only apps.

Philip Schiller, Apple's senior vice president of Worldwide Product Marketing says;

In just three years, the revolutionary App Store has grown to become the most exciting and successful software marketplace the world has ever seen. Thank you to all of our amazing developers who have filled it with over 425,000 of the coolest apps and to our over 200 million iOS users for surpassing 15 billion downloads.

Others quoted include Dr. Ge Wang, a Smule co-founder and assistant professor at Stanford's Center for Computer Research in Music and Acoustics, who says;

We sparked musical magic when iPhone users experienced Ocarina three years ago. And now with iPad, we've created the Magic Piano and Magic Fiddle apps. Who could've dreamt an iPad would make its way into the San Francisco Symphony?

Second to last we have Mark Rein, vice president and co-founder of Epic Games who adds;

iPad provides us with an unparalleled mobile device for creating gorgeous, immersive games. Infinity Blade has been a runaway hit with customers around the world and we couldn't be more excited about our success on iOS devices.

And finally, Nicholas Callaway, CEO of Callaway Digital Arts who chimes in with;

We're bringing Martha Stewart, Angelina Ballerina, Sesame Street and many more of the world's most popular books and magazines to iPad. We knew the iPad was going to be a revolutionary storytelling device, but never could have anticipated it would become so popular, so quickly.