Anyone looking for a mentally challenging and head-scratching experience on iOS need look no farther than The Fourth Dimension. The Fourth Dimension is a 30-page interactive book that attempts to explain to all of us non-mathematicians what exactly a 4D world and tesseracts are. The app made it to the top five in the App Store in Education shortly after its release.

Despite the serious and intellectual nature of the app, the developers obviously have a sense of humor. They describe the app as “hand-crafted from fine Corinthian ones and zeros” and “probably safe for children.”

Instead of being a simple book with text and pictures, the app actually lets users interact with a 3D environment to help them understand the fourth dimension. The text is obviously important as well. Users will get to see more of that nerd humor in the text as well as easy to understand metaphors to help readers grasp the 4D world.

The Fourth Dimension is a universal app and is available for $2.99.

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