iCrosss is a unique educational application which will help you learn solid geometry in an easy and funny way.

"It is an extremely well-done interactive encyclopedia of polyhedra" - Kurt Schmucker (Parallels Senior Product Manager)

iCrosss allows you to build a cross-section of each available polyhedra by your defined plane. The plane can be defined by three points (taps) on polyhedron faces. The application supports such kinds of polyhedra as regular polyhedra (Platonic solids), Pyramids, Prisms, Anti-prisms and Archimedean solids and duals. Polyhedrons are displayed in 3D representation, which allows you to rotate it in any direction. Cool chalkboard drawing style and fonts were used for awesome look’n’feel. To build a cross-section you have to put three points on polyhedron faces in order to define a section plane.

There is several view modes that you can use for better cross-section experience: 3D mode, Épure (3 projections mode), 3D cut mode. 3D cut mode is available only when you have already built cross-section. In this mode you can choose one of two solid pieces of initial polyhedron to continue work with. Available menu for printing and sending via e-mail of the polyhedron or its section. You can access information regarding selected solid, which includes short description, number of faces, vertices, edges, web-link for more information and useful formulas. Polyhedra are organized in simple list divided by categories. Moreover, you can put polyhedrons you like into favorites list. Favorite solids are marked by a golden star and can be rapidly accessed.

A tutorial mode was designed for quick understanding. It will take you through the general application features.

To display formulas custom rendering engine was developed. It visualizes a LaTeX formula format.

What’s New

Version 1.5

-support for iOS8 and iPhone 6, iPhone 6 Plus
-bug fixes
-provided link to GeoCon

Ratings and Reviews

4.7 out of 5
36 Ratings

36 Ratings

Manuelamericano ,



Chuchilla ,

Secret use of this app...

If google and IBM were brighter than they are now, they would buy out this app just to get at the list of app users.

The simple fact is that people interested in these sorts of mathematical entertainments are likely the best human feedstock for creative engineering, and development, or creative positions.

Minds that joy such diversions are wired better ...or at least differently.

Now... How many of the examples are not physically correct in a stiff 3-space iplementation?

Can you tell?

A few projections of spatial geometries from n-space to 3-space might be interesting to use as evaluation tools for complex spatial comprehension.

Fun for a wide range of audience, from youths, to adults.

MyNameIsBillyBob ,

Ideas for future

Great app! Has so many shapes I did not know even existed. And I'd have no idea what they were called even if I did know about them! However, just as a creative idea, maybe as something to implement in future updates, I would suggest generating 4-Dimensional and 5-Dimensional shapes! That would be super cool and, in my opinion, separate you from the pack! (Also, if you do implement it, and obviously if it's my idea you use, I would appreciate some sort of mention in the info or credits or something like that. I don't care about money or royalties or whatever other stuff people usually do.)
- Alex Hickman
5th Year Student at Sir John A. Macdonald Secondary School
Waterloo, Ontario (Canada)

P.S. For all you doubters out there... Yes, there are more than 3 dimensions in existence!


Oleh Yudin
8.8 MB

Requires iOS 5.1.1 or later. Compatible with iPhone, iPad and iPod touch.


English, Russian, Spanish

Age Rating
Rated 4+
© Oleh Yudin, 2011


  • Family Sharing

    Up to six family members will be able to use this app with Family Sharing enabled.

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