http://threeacts.mrmeyer.com/25billionapps/     To find the date and time of when this contest ends is kind if a lengthy process. First on February 24th at 6:27 p.m. there were 24,658,507,655 downloads. You subtract that from 25,000,000,00 and get 341,492,345 downloads left. I found the average by adding up the numbers from 6;27 p.m to 6:30 p.m. You then divide that by the average which is around 33,800 to get 10,103 minutes until we reach 25,000,000,00.  If you divide that by 60 you get the number of hours left which is 168 hours.Then you divide that by 24 to get the number of days which is 7 days left until we reach 25 billion. That would mean we would reach the 25 billion mark on March 2nd at 6:27 p.m. That would mean you would want to start downloading apps at around 6:15 or 6:20.