Earlier this year, Khan Academy released an iPad app. On Tuesday, the nonprofit shared a sneak peek at its new free iPhone app, which it says will come out this week.

Here’s a look:

No word on the potential release of an Android app, but it seems fairly likely that one will be released eventually, given the number of people using Android devices and Khan Academy’s aspirations to reach anyone who wants to learn.

Plus, Google and Khan Academy have been pretty tight. Not only are the site’s thousands of videos hosted on Google’s YouTube, but Google has provided millions of dollars to fund it. It was one of the winners of Google Project 10 to the 100. Earlier this year, Google’s first hire even left the company for Khan Academy.

Here’s more on what the iPad app has to offer. We should see soon what features are available on the iPhone version.