Khan Academy for iOS has just received its third major update.

The official iOS app of the popular nonprofit educational website created by educator Salman Khan was released for iPad in March last year. It received its first major update, which brought Retina graphics for the then new iPad, in the same month.

Its second major update came in November, with which the app was finally optimized for iPhone and iPod touch.

Now, with the app’s third major update, the iPhone and iPod touch edition of Khan Academy has gained support for a function that was previously available only on the app’s iPad version.

With the newly updated app, you can now log in and track your video watching on your iPhone or iPod touch. You can now also check out your profile summary and recent activity on your smaller iDevice.

Note, though, that downloading videos for offline viewing and navigating videos through subtitles remain exclusive to Khan Academy for iPad.

Khan Academy

In any case, all of Khan Academy’s more than 4,000 educational videos are accessible to you whether you’re using an iPad or an iPhone or iPod touch.

The latest update to Khan Academy for iOS also improves the app’s headers so that more of the category titles, especially the long ones, can be read at the top of each page.

The new version of Khan Academy for iOS is available now in the App Store as a free universal download.

Note that this release is compatible with iOS 6.0 or later only. If your device doesn’t support iOS 6 or if you don’t intend to update it to iOS 6, you can still watch Khan Academy videos from your iDevice by going to http://www.khanacademy.org on your preferred mobile browser.