Apple has promised to offer a $10,000 App Store gift card to the lucky person whose app download hits the 25th billion milestone.

As of now, the countdown clock shows 24,396,484,991 downloaded apps. So how can one hit the jackpot? One can either be the lucky 25th billion app downloader or one can fill up the the entry form  which does not require any purchase or download.

Apple's 25 Billion Apps Countdown Promotion has kicked off on February 13, 2002 and will be end automatically with 25 billionth downloaded app or the receipt of the non-purchase entry after the download of the 24,999,999,999th app, whichever comes first.

The winner's $10,000 App store Gift Card is redeemable in the iTunes Store, App Store, and iBook Store.