Flipboard has definitely grown up from its humble beginnings two years ago. In celebration of its second birthday, the company created an interesting infographic with some amazing stats.

The app, which started out as iPad only, but has grown to the iPhone and even Android, boasts more than 20 million users who have logged more than 3 billion “flips” per month. At the current rate, more than one new user starts with the app every second. More than 1.5 million people use the service daily.

Here’s the infographic in its entirety. Click it to see the full version.

It has definitely been a busy year for the news aggregator. Earlier this summer, the app introduced premium content from The New York Times. And in June, the company became a “trusted” Google partner as Google+ and YouTube were integrated into Flipboard.

While I’m pleased to see Flipboard become so successful, I do wonder what the app, and what seems like the endless spawn of copycats, is doing to news sites. Would readers rather have their news chosen by professionals, or by computer-generated algorithms that “sense” what users want?

My colleague Jamie Young went a little more in-depth about this issue earlier this year, and what she has to say is definitely worth reading.

Flipboard is a universal app for both the iPhone/iPod touch and iPad. It can be downloaded in the App Store for free.