Today, Apple has announced that App Store sales topped $10 billion in 2013. In December alone, customers spent over $1 billion in the store, a record-breaking figure — the most successful month in App Store history. In total, developers for iOS and OS X have now earned $15 billion on the App Store.

“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.”

Cue called the app lineup for 2013 ‘astonishing’. In the report, Apple calls out a handful of apps in particular for their success, including Heads Up, Candy Crush, and QuizUp.

2013 saw surprise hits like Ellen DeGeneres’ Heads Up, ProtoGeo’s Moves, Simon Filip’s Afterlight and Kevin Ng’s Impossible Road. Many of the year’s biggest successes like Candy Crush Saga, Puzzles & Dragons, Minecraft, QuizUp and Clumsy Ninja were created by international developers, while Duolingo (United States), Simogo (Sweden), Frogmind (UK), Plain Vanilla Corp (Iceland), Atypical Games (Romania), Lemonista (China), BASE (Japan) and Savage Interactive (Australia) emerged as developers to watch in 2014.

Apple is set to report its financial earnings for the holiday quarter (such as iPhone and iPad device sales) on January 27th.