# The Fourth Dimension — Hold a tesseract in your hands > Interactive book explaining the fourth dimension with a 3D touch interface. (iPhone/iPad app by Lunar Skydiving LLC.) - Source: https://appshunter.io/ios/app/the-fourth-dimension/id504201783 (this page in markdown: same URL + `.md`) - Developer: [Lunar Skydiving LLC](https://appshunter.io/developer/504201786) - Category: Education, Books - Price: $2.99 - Rating: 4.80/5 from 1,939 App Store ratings · 307 written reviews indexed - Age rating: 4+ - Requires: iOS 12.0 · 5 MB - Languages: American English, French (France), German (Germany), Italian, Japanese, Korean, Russian, Chinese (Simplified, China), European Spanish, Chinese (Traditional, Taiwan) - Released: 2012-03-19 - Data updated: 2026-09-06 - Monetization: free with in-app purchases - User reviews in markdown: https://appshunter.io/ios/app/the-fourth-dimension/id504201783/reviews.md ## What is The Fourth Dimension? The Fourth Dimension is a 30-page interactive book that explains a single mathematical idea in language that anyone can understand. Instead of static images or canned videos, this app employs a unique 3D touch interface that lets you literally grasp the concept of the fourth dimension with your own hands. “Not only can you blow your own mind over and over again, you can also enjoy watching your friends’ minds being blown in front of you.” — Cult of Mac “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.” — BuzzFeed “The app is very cool, and it's unlike pretty much anything we've seen in the App Store.” — The Verge “This is one of my most favorite iOS apps ever.” — George Musser, contributing editor for Scientific American and author of The Complete Idiot's Guide to String Theory (App Store user reviews follow.) “Blew my mind. I generally don't use 'learning' apps as they're mostly gimmicks. This one, though, truly made me think. I hope this developer comes out with more outstanding apps such as this one. Bravo!” — Iceitic “Astounding. That some people care passionately enough about tesseracts to go create a fantastic app for others to understand them is incredible. The app is extremely well designed, wittily written, and executed with love. That alone is worth buying it, besides the fact that I learned what the hell a tesseract was.” — Duncan MacMichael “Fantastic! This is what someone really smart, and who really knows how to teach well, can do with a tablet. And the authors are funny, too, which is a neat bonus.” — DNY “Fantastic app. I work at a leading UK university. If only all our material was this well written and presented. Definitely worth buying and then spending a bit of time with over a day or two to get your head around the fourth dimension. Great app!” — JulesFM “Great job! This app does the best job explaining the 4th dimension. Why learn it in some boring classroom when here you can have an interactive and visual explanation.” — Aco Strklalj Over 250,000 people have blown their minds with this app. ## Key features - Interactive 3D touch interface - Explains the fourth dimension - Accessible language for all - 30-page interactive book - Visual and hands-on learning ## Recent user reviews (10 of 307) All indexed reviews: https://appshunter.io/ios/app/the-fourth-dimension/id504201783/reviews.md ### 5/5 — Amazing *2026-03-07, version 1.14* A fun and interactive way to understand the 4th dimension - it’s the first time I’ve truly come to understand this mysterious dimension. ### 5/5 — Way way cool! *2026-03-07, version 1.14* One of the most intriguing mathematical models I’ve ever seen. Totally worth a look! ### 5/5 — Mind Bending *2025-12-17, version 1.14* I love this app so much. I may not use it every day, but I do use it often. It is so hard (potentially impossible even) to contemplate what a 4 dimensional object is and how it behaves. This app has been a godsend to me because it never fails to stimulate my brain in both curiosity and fascination. Highly recommend, and don’t just go through the process once. Repeat it, and marvel in it, and then after some time has passed repeat the process, and after a few times you will be blown away when you start to grasp the impossible. Thank you Devs!!! ### 5/5 — Decent *2025-11-21, version 1.14* Came back to this after maybe a decade! The issue I’m having on my 13 pro max is the stereo images are too far apart for me to make them converge. I suggest adding a slider to change the binoculars distance. My IPD is about 57mm. ### 5/5 — Fantastic *2025-10-29, version 1.14* Can’t say enough about how much I like this app. The only sad part is there isn’t more. It’s a great explanation of the 4th D. ### 5/5 — An excellent birthday gift! *2025-10-21, version 1.14* Wow, just wow :) ### 5/5 — Projection inna 4D journey *2025-08-03* Thanx a lot, this is very interesting. projections inter Space dimensions are so use full to understand the process! the 4th Time dimension isn’t in easy accèss but this app clearly show the way…. Great!! ### 5/5 — I thought I already got it. *2025-06-02, version 1.14* Like you might be thinking about now. You might be right… I was not. The term Gestalt Switch refers to the often sudden and irreversible moment of epiphany, when the mind finally breaks thru the veil of murky ignorance from which we each strive to emerge, into the dazzling effulgence of nascent comprehension. Like BLAOW! And you grok it. Rarely are such moments handed to us in pill form. And rarely from literal higher dimensions. This app is the exception, so even if you think you get it, GET IT. Get it? ### 5/5 — Still Amazing *2025-04-19, version 1.14* I played through the interactive scenes in this app years ago and found the 2D -> 3D -> 4D rotation analogies really helped to give an intuitive sense for the shape of a tesseract. The attention to detail and production values are quite high, and I was very happy to find that it still works perfectly in 2025. I’d love to see more from this developer! ### 5/5 — Beautifully executed *2025-04-17, version 1.14* Beautifully executed visual representation of a complex theory. So rare these days to find an app that focusses only on what it’s trying to do and does it well - incredibly user friendly, well designed, well written and effective as a learning aid. I really hope the developer and/or creator are working in some kind of education capacity now. ## Frequently asked questions about The Fourth Dimension ### What is The Fourth Dimension app? The Fourth Dimension is a 30-page interactive book designed to explain the concept of the fourth dimension. It utilizes a unique 3D touch interface, allowing users to physically interact with and grasp the mathematical idea. ### How does the app explain the fourth dimension? Instead of static images or videos, the app employs an innovative 3D touch interface. This allows users to literally hold and manipulate a tesseract, providing a hands-on and visual way to understand the abstract concept of higher dimensions. ### Is the app free to download? The app is available for free download. However, it does contain advertisements, which is how it is supported. Users can experience the interactive learning content without an initial purchase. ### What devices is The Fourth Dimension compatible with? The app is designed for iOS devices. Its interactive 3D touch interface is optimized for tablets and smartphones that support these advanced touch capabilities, offering a rich visual and tactile learning experience. ### Who would benefit from using this app? This app is ideal for anyone curious about advanced mathematical concepts, particularly the fourth dimension. It's suitable for students, educators, or anyone who enjoys learning through engaging and unconventional methods, making complex ideas accessible to a broad audience. ## Version history (last 5 releases) ### 1.14 — 2023-10-17 Updated for iOS 17. Plays audio when the device's Silent Mode is on. ### 1.13 — 2022-09-12 Updated for iOS 16. ### 1.12.1 — 2021-10-16 Updated for iOS 15. ### 1.12 — 2021-10-03 Updated for iOS 15. ### 1.11 — 2019-09-26 Updated for iOS 13. ## Apps similar to The Fourth Dimension | App | Rating | Price | Category | | --- | --- | --- | --- | | [3D Hypercube](https://appshunter.io/ios/app/3d-hypercube/id1445757973) | — | Free | Education | | [Crystal Flight](https://appshunter.io/ios/app/crystal-flight/id1436396839) | 5.0 (1) | Free | Education | | [KaleidoTile](https://appshunter.io/ios/app/kaleidotile/id1374849164) | 4.1 (7) | Free | Education | | [Mysteries of Fractal](https://appshunter.io/ios/app/mysteries-of-fractal/id1086527481) | 4.7 (164) | $4.99 | Education | | [4D Draw](https://appshunter.io/ios/app/4d-draw/id926050711) | 3.3 (7) | Free | Education | | [Game of Life (xs)](https://appshunter.io/ios/app/game-of-life-xs/id997719497) | 4.4 (28) | Free | Education | ## Related topics [the fourth dimension](https://appshunter.io/ios/topics/the-fourth-dimension) · [4d toys](https://appshunter.io/ios/topics/4d-toys) · [fourth hand](https://appshunter.io/ios/topics/fourth-hand) · [dimensioner](https://appshunter.io/ios/topics/dimensioner) · [dimensione](https://appshunter.io/ios/topics/dimensione) --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-09-06.*