Julie Bort explains:

Google announced today that it bought Divide, a company that makes a popular app that lets you securely access corporate documents and email from your phone.

Terms of the deal were not disclosed, but Divide, founded in 2010, has raised $23 million from venture investors including Google's own VC arm, Google Ventures.

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As its name implies, this app divides an Android device into personal space and business space. In geek speak, this kind of app is called a "secure container." It's not the only app that does such a thing. VMware Horizon is another, and Samsung offers this on its Android devices too, via a feature called Samsung Knox.

But Divide was a really popular secure container app, downloaded over 200,000 times as of last October, TechCrunch reported. And users rated it with a four stars out of five on the Google Play app store.

According to the blog post from the Divide team, Divide is joining Google as an acquihire and the app will continue to be developed and supported "as it always has."