Apple on Tuesday said that sales from its App Store topped $10 billion in 2013. Think about that for a second—$10 billion in apps over 12 months. That’s an incredible amount of apps and money.

December was especially good for Apple and its developers. Over $1 billion, and almost 3 billion apps, were downloaded in December alone, making it Apple’s most successful month ever.

Apple said that developers have made over $15 billion in app sales from the store since it opened.

“We’d like to thank our customers for making 2013 the best year ever for the App Store,” said Eddy Cue, Apple’s senior vice president of Internet Software and Services. “The lineup of apps for the holiday season was astonishing and we look forward to seeing what developers create in 2014.”