The Fourth Dimension

Explore the fourth dimension on your iPad or iPhone.

“The app is very cool, and it's unlike pretty much anything we've seen in the App Store.” — Sam Byford, The Verge

“One of the coolest apps I've ever used... The Fourth Dimension is to boring learning apps what Carl Sagan's Cosmos was to staid science documentaries.” — John Herrman, BuzzFeed

“This is one of my most favorite iOS apps ever.” — George Musser, senior editor at Scientific American and author of The Complete Idiot's Guide to String Theory

Average 5 stars from 350 ratings
Reached top 5 in the App Store in Education

What is the fourth dimension? Most people assume it is an inaccessible parallel universe that is impossible to completely understand, much like North Korea. This app lets you see it for yourself with only a minimal amount of headaches and nausea.

This app is a 30-page interactive book that explains the fourth dimension visually, without having to resort to Carl Sagan, fruit, plexiglass models, or classical music.

Using a revolutionary intuitive touch-based interface, you’ll be able to directly manipulate a four dimensional object called a tesseract and understand how it behaves.

✓ Hand-crafted from fine Corinthian ones and zeros.
✓ Free of upsetting mathematical equations.
✓ Probably safe for children.

“This app was so educational, it felt like a brain-expanding experience. After using it I was able to hear colors and I had a pleasant conversation with my dog for several hours. The effect wore off, but I am still really happy with this purchase.” — Andy Fischer

“By taking advantage of the fourth dimension, I’ve been able to shorten my morning commute by twenty three minutes.” — M. Stubing

“Now that I have a solid intuitive understanding of four dimensional geometry, I’ve noticed that Jehovah’s Witnesses no longer stop by my house.” — Fitzgerald Wong

“I avoided being mugged in a dark alley in Hoboken because I was able to successfully distract the perpetrator with this app for two hours. When the police finally arrived, they rudely interrupted our discussion of elliptic geometry.” — Consuela Garbonzo

(Actual user-submitted app store reviews follow.)

“I applied the techniques I learned in this app to my cooking class. I was able to take lobster bisque and rotate it around a fourth dimensional axis thereby transforming it into pad thai.” — Anonymouse7345

“Wonderfully thought out app. A lot of fun to play with. I took too much time with it, but after I fought off the Morlocks who'd taken my phone and returned to the friendly Eloi, I was able to come back to early 21st-century Minneapolis. Would buy again!” — Ed B.

“I purchased this app on January 9th, 2013, to help visualize a tesseract... It helped a lot. The 3D 'Mind's Eye' style representation really helped solidify it for me. Only problem is, I'm now trapped over 9 months in my past, and I have to avoid myself so as to prevent a space-time paradox...” — shaniber

“The string theorists lied to me! I was led to believe that extra dimensions were available as in-app purchases, but it turns out they're so tightly folded that they can't actually be paid for.” — D. Martinez

Free bonus activities
Watch an amateurish YouTube video of a tesseract being manipulated with this app.
Download our press kit and help us sell this app door to door.
Print out and construct your own 4D glasses and peer into the fourth dimension.
Math geeks only: Read about how the app’s 4D direct manipulation was implemented.