4D Toys 4+

Mindbending 4D physics objects

mtb design works. Inc.

    • #177 in Education
    • 4.8 • 235 Ratings
    • $6.99



"I am not sure that I've ever seen a more compelling 'show-don't-tell' educational tool than 4D Toys." –Ars Technica

What if you received a box filled with mysterious toys from a fourth spatial dimension?

• Playfully explore and marvel at beautiful shapes powered by a groundbreaking 4D+time physics system.
• Poke, throw, roll and watch as they disappear into a dimension you can't see.
• Get an intuitive feel for how four-dimensional objects behave:
• Become a child of the fourth dimension.

In this case the 4D is not time but a 4th dimension of space that works just like the first three dimensions we are familiar with. If you count time these toys are 5D. It turns out that the rules of how objects bounce, slide and roll around can be generalized to higher dimensions, and this unique toy lets you experience what that would look like.

• Over 130 beautiful interactive scenes to play with, with more to be added in updates.

• Groundbreaking 4D+Time Physics Engine that uses new mathematics created for this project.

• Multi-touch & Accelerometer support for rich interactivity.

• 2D/3D "Flatland" Interactive 10 Page Book/Explanation that teaches by analogy about a fourth spatial dimension.

• Special buttons: Anti-Gravity, Wireframe Projection, 4D Accelerometer and ability to export meshes for 3D printing.

Some things to do:

• Manage to fit the hypercube into the hyperhole!
• Use the 4D shapes as fancy, perfectly symmetric, fair dice that have 5, 8, 16, 24, or even 120 and 600 sides!
• Unbind Rings using the fourth dimension!
• Make a stack of 4D hypercubes and smash it!
• Set up an interesting path for a few 4D dominoes!
• Make levers that throw hypercubes into the fourth dimension!
• Use multitouch to "squeeze" out objects into the fourth dimension!
• Play in a 4D ball pit!
• See Tesseracts (i.e. 4D hypercubes) slide down slopes!
• etc...!

What’s New

Version 1.7.1

Added the Klein Bottle!

See the complementary explanation video: https://4dtoys.com/klein

Also added:
- The 2D Loop as a helper explanation for the Klein bottle
- The "Spherinder Klein Bottle," a higher dimensional generalization of the Klein bottle.

Bug Fixes since 1.7:
- Fixed a bug where older devices would run out of memory loading the Klein Bottle. Any devices released before 2017 now loads a lower detail version instead. Email support@4dtoys.com with any issues.

Ratings and Reviews

4.8 out of 5
235 Ratings

235 Ratings

Rzane$ ,


A new feature I would really like to see is to add some 5D shapes to play around with. You could add another slider on the left side of the screen (or maybe the top) to slide along 4D slices of the 5D world. That would be really fun.

This app is my favourite 4D app on the App Store. There are so many unique shapes and toys to play with, it can entertain you for hours! One of my personal favourites is trying to fit the tessaract into a (hyper?)hole. That took me a long time, and really gave me a better intuition about 4D.

Rome J ,

The best

One of the best conceptual games (if I can call it that. This is real theoretical mathematics here) on the iPhone right now. Something fun for the kids. But I play it more trying to understand and conceptualize and defragmenter and reconfigure years of institutional learning. It’s a quite whisper from a person telling the truth ima room full of loud, ignoramuses. I can’t wait for meigekure. Just form the concept it’s like u have to make a million games in 1. A million landscapes and 3D space synchronization that I can’t conceive of right now. Phenomenal.

тне меапiпg оf lifе ,

Beautiful app, but...

The app is beautiful and perfect in every way for these highly unusual shapes, but one tiny suggestion would be to have an option to keep the object in view at all times. That would actually help gameplay a lot. Dice, for example, would be easier to keep in view, like the 120 side. Then, you don’t have to go searching for where you can see it properly.

App Privacy

The developer, mtb design works. Inc., indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.

Data Not Collected

The developer does not collect any data from this app.

Privacy practices may vary, for example, based on the features you use or your age. Learn More


  • Family Sharing

    Up to six family members can use this app with Family Sharing enabled.

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