[More from Mashable: Is Flipboard About to Lose Access to Twitter?]
Usage of Flipboard has increased drastically over the past year. The company behind the social newsreading app, which is celebrating its second anniversary Tuesday, announced it now has more than 20 million registered users, up from 5 million in December.
Flipboard owes that growth largely to platform and geographic expansion. After nearly a year-and-a-half as an iPad-only application, Flipboard launched on the iPhone in early December, growing from 4 million to 5 million users in a week. In late June, the app arrived on Android smartphones. Flipboard also released a number of international editions with region-specific content, including China, France, Germany, Italy, Korea, the Netherlands and Spain.
[More from Mashable: Publishers Begin Pulling Advertising From Flipboard]
Beyond those expansions, Flipboard has also added a number of new features and integrations over the past year, including audio, Google+ and content from The New York Times.
Still, not all has been bright and rosy for Flipboard: After pilot testing, some publishing partners disclosed in June that they would no longer serve ads through the app. And it seems increasingly likely that Flipboard is going to lose access to one of its major content sources, Twitter. Flipboard co-founder and CEO Mike McCue stepped down from Twitter's board earlier this month.
The company created an infographic celebrating its two-year anniversary, which we've embedded below.
This story originally published on Mashable here.