(Telecompaper) Apple's App Store recorded over USD 20 billion in sales last year. The company announced that a new sales record was also set over the Christmas and New Year's holiday season. In the two weeks ending 03 January, customers spent over USD 1.1 billion on apps and in-app purchases, setting back-to-back weekly records for traffic and purchases. The first day of 2016 marked the biggest day in App Store history with customers spending over USD 144 million. It broke the previous single-day record set a week earlier on Christmas Day.