Apple has posted a new contest celebrating the download of the 25 billionth app. As the company has with past countdown contests, it has posted a counter roughly showing the number of apps downloaded to this point on the contest page; similar graphics have yet to appear on the main iTunes Store or App Store, but will likely appear later today. “As of today, nearly 25 billion apps have been downloaded worldwide”, reads the contest page. “Which is almost as amazing as the apps themselves. So we want to say thanks. Download the 25 billionth app, and you could win a US$10,000 App Store Gift Card. Just visit the App Store and download your best app yet.” The contest will end once the 25 billionth app has been downloaded; no purchase or download is necessary to enter.