Apple Thursday announced that its iTunes U service has hit one billion downloads. The iTunes U is an app that features free educational content from top schools, prominent libraries, museums as well as organizations.

The iTunes U is available free to download on Apple's App Store. With one billion downloads, Apples is celebrating by offering most popular courses such as Stanford's iOS development teachings, a psychology class on understanding happiness from TED and Yale University's course of financial markets.

"It's inspiring to see what educators and students of all types are doing with iTunes U," said Eddy Cue, Apple's senior vice president of Internet Software and Services, Apple Insider reported. "With the incredible content offered on iTunes U, students can learn like never before-there are now iTunes U courses with more than 250,000 students enrolled in them, which is a phenomenal shift in the way we teach and learn."

Apple has also confirmed that more than 250,000 students have enrolled to the service and more than 60 percent of iTunes U app downloads were originated from outside the U.S.

The app includes more than 1200 universities and colleges, as well as 1200 kindergarten to grade 12 schools and districts hosting over 2,500 public and thousands of private courses. The course includes variety of topics such as arts, sciences, education, business, health and medicine and many more.

The company has also released details that leading colleges and universities including Duke, Yale, Cambridge, MIT and Oxford have enrolled more than 100,000 students in single iTunes U courses.

Apple also highlights that over 100,000 students have enrolled on iTunes U General Chemistry course by Ohio State University's Matthew "Dr. Fus" Stoltzfus in the first year it was offered.

"The interest my iTunes U course receives from non-college students is overwhelming," Stoltzfus said. "I've been working with high school teachers who use my iTunes U material to prepare to teach their own classes, high school students all over the world who are leveraging the course to tutor their fellow classmates, even retirees who download my iTunes U course to stay intellectually active."

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