Analytics company Flurry estimated that 1.2 billion apps were downloaded between Christmas Day and 31 December, whilst over 20 million Android and iOS devices were activated.
In the UK there were 81 million app downloads, making it the third most app happy nation in that week. The US took the lion's share of downloads, however, racking up 509 million. China was second on 99 million.
Flurry expects breaking the one-billion-download-barrier per week will become more common-place.
"The final week of the year, between Christmas and New Year's Day, grew by 60 per cent over the early-December baseline, historically punching through the billion download barrier for the first time ever," said Flurry's Peter Farago, in a blog post.
"Looking forward to 2012, Flurry expects breaking the one-billion-download-barrier per week will become more common-place. While iOS and Android growth continues to amaze, the market is still by all measures relatively nascent."
App downloads far surpassed expectations in 2011. In early December, it emerged Google's Android Market had seen 10 billion apps downloaded in total. The tech giant said it was seeing a growth rate of one billion app downloads per month.
In October, ABI Research said Android had overtaken iOS in terms of app downloads. Ovum predicted earlier in the year that Android would be ahead of Apple's app sales by around two billion by the end of 2011.
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Tom Brewster is currently an associate editor at Forbes and an award-winning journalist who covers cyber security, surveillance, and privacy. Starting his career at ITPro as a staff writer and working up to a senior staff writer role, Tom has been covering the tech industry for more than ten years and is considered one of the leading journalists in his specialism.
He is a proud alum of the University of Sheffield where he secured an undergraduate degree in English Literature before undertaking a certification from General Assembly in web development.