# iCrosss

> Interactive 3D solid geometry encyclopedia for learning polyhedra and their cross-sections. (iPhone/iPad app by Oleh Yudin.)

- Source: https://appshunter.io/ios/app/icrosss/id431653759 (this page in markdown: same URL + `.md`)
- Developer: [Oleh Yudin](https://appshunter.io/developer/381844540)
- Category: Education, Entertainment
- Price: $0.99
- Rating: 4.70/5 from 30 App Store ratings · 142 written reviews indexed
- Age rating: 4+
- Requires: iOS 5.1.1 · 9 MB
- Languages: American English, Russian, European Spanish
- Released: 2011-04-19
- Data updated: 2026-08-25
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/icrosss/id431653759/reviews.md

## What is iCrosss?

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.

## Key features

- Interactive 3D polyhedra models
- Cross-section generation by plane definition
- Multiple view modes (3D, Épure, 3D cut)
- Detailed polyhedron information and formulas
- Favorites list for quick access
- Tutorial mode for easy learning

## What do users think of iCrosss?

Overall sentiment: positive

**Pros**

- 👍 Intuitive and easy-to-use interface
- 🎨 Beautiful 3D visualization and rendering
- 🔄 Smooth rotation and manipulation of shapes
- 📚 Comprehensive collection of geometric shapes
- 🧠 Excellent for learning and understanding geometry
- 💡 Innovative cross-section feature
- 🎓 Great educational tool for students and teachers
- ⚡ Clean, elegant design
- 💰 Reasonable pricing for the value provided
- 🔍 Detailed information and formulas included

**Cons**

- 🐛 Occasional crashes and stability issues
- 🎨 Limited color customization options
- 🔋 Battery drain and memory consumption concerns
- 📖 Lack of clear instructions or help documentation
- 🎯 Missing common basic shapes
- ⚠️ Dull background design
- 🔌 App crashes when removing panels

**Commonly reported bugs**

- App crashes when removing panels
- Crashes during cross-section splitting
- Crashes when exporting to PDF
- Freezing and requiring system reboot
- Sudden unexpected shutdowns
- Memory optimization issues on older devices

**Most requested features**

- Add cylinders, cones, and spheres
- Include rectangular prisms and basic solids
- Color customization for edges and faces
- Display geometric formulas and calculations
- Show number of faces, edges, and corners
- Add ability to see inside spheres and solids
- Create printable nets for paper models
- Add 4D and 5D shape visualizations
- Include frustums of pyramids
- Add different pyramid base types (hexagonal, pentagonal)
- Dynamic cross-section manipulation
- Animated cross-section sliding
- Wikipedia or info links within app
- Ability to stretch and scale shapes
- Open up forms to visualize unfolded versions
- Pinch gesture to change edge lengths
- Thicker line width options for edges
- Hide hidden/dashed lines option
- Star tetrahedron shape
- Multiple cuts capability
- Join geometric models feature

## Recent user reviews (10 of 142)

All indexed reviews: https://appshunter.io/ios/app/icrosss/id431653759/reviews.md

### 1/5 — нет цилиндра

*2023-09-14*

нет цилиндра

### 5/5 — Yup

*2022-12-17*

Love it. I use it a lot. 

I’m hoping you might add the ability to see the solid inside a sphere. To see the relationship of all the outer points touching the sphere’s extents. Thanks for considering.

### 5/5 — beautiful

*2022-12-06, version 1.5*

Beautifully rendered geometric shapes and concise descriptions of each. I love being able to easily turn and rotate each shape to see it from every angle and marvel at its perfection and finally spinning them endlessly til we both collapse, fully satisfied, to enjoy the after-glow of our geogasm :D

### 5/5 — Очень хорошее приложение.

*2021-09-28*

За 15₽ получаешь большую базу объемных фигур. Очень просто приложение в использовании. Спасибо разработчику!

### 5/5 — Still great, still hoping for more!

*2020-11-14*

Lovely app for what it does and for the price. Mostly at this point a visualisation aid. Apps like these are still rare and increasingly in demand. I would be happy to pay more for more options.

### 5/5 — Trabalhar com 2 ano - on-line

*2020-05-18*

Pessoal, parabéns por desenvolver algo “simples” mas que tem uma relevância INIMAGINÁVEL na visualização dos sólidos e suas faces pós secção! Fiz várias questões do ENEM com meus alunos, no ambiente virtual, espelhando meu celular na tela do computador. Como dica, para quem comprar o app, como eu, no caso, ter a opção de baixar esse app no PC e colocar nosso registro, é poder utilizar diretamente do computador. Reitero meus PARABENS!

### 5/5 — Давно не было отзывов, напишу свой

*2019-12-10*

Приложение отличное! За 15 р ты получаешь такой функционал, который очень поможет тебе в учебе!
Жаль описание фигур на английском, и это врядли поправят ведь приложению уже сто лет

### 5/5 — Good app

*2019-09-16*

This app is simple and effective at teaching geometry shapes. It is a must have. Good job developers.

### 5/5 — 希望增加最基础球体的 谢谢

*2019-03-24*

软件非常棒 希望增加最基础球体的 谢谢

### 3/5 — Not bad/差强人意

*2018-06-12*

It is a great help for learning polyhedrons, but the diagrams presented by the software do not follow the principles of perspective.

对理解多面体有很大的帮助，但是画的图并没有遵循透视学原理。

## Frequently asked questions about iCrosss

### What is iCrosss?

iCrosss is an educational application designed to help users learn solid geometry in an engaging way. It provides interactive 3D models of various polyhedra, allowing users to explore their shapes and generate cross-sections.

### How do I create a cross-section in iCrosss?

To create a cross-section, you define a plane by tapping three points on the faces of a polyhedron. The application then generates and displays the resulting cross-section.

### What types of polyhedra are supported?

The application supports a wide range of polyhedra, including regular polyhedra (Platonic solids), pyramids, prisms, anti-prisms, Archimedean solids, and their duals.

### Is iCrosss free to use?

Yes, iCrosss is a free application. It does not feature in-app purchases or advertisements, allowing for an uninterrupted learning experience.

### What are the different viewing modes available?

iCrosss offers several viewing modes to enhance the cross-section experience. These include a standard 3D mode, Épure mode (three projections), and a 3D cut mode which allows you to work with one of the two solid pieces after a cross-section is made.

## Version history (last 5 releases)

### 1.5 — 2014-12-11

This update from Apple will improve the functionality of this app. No new features are included.

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

### 1.4 — 2013-08-22

-minor bug fixes

### 1.3 — 2013-05-31

- Spanish localisation
- iPhone 5 resolution support
- added Icosidodecahedron 
- some bugfixes

### 1.2 — 2012-07-12

-added ability to change the cross-section dynamically by moving points
-printing support
-send polyhedron via email support
-added pinch gesture to separate the parts of polyhedron without going through Épure mode
-minor fixes

### 1.1 — 2011-06-01

added russian localization
minor fixes

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## More apps by Oleh Yudin

- [iCrosss Lite](https://appshunter.io/ios/app/icrosss-lite/id509927782)
- [GeoCon](https://appshunter.io/ios/app/geocon/id919438041)
- [GeoCon HD](https://appshunter.io/ios/app/geocon-hd/id919438593)

All apps by Oleh Yudin: https://appshunter.io/developer/381844540

## Related topics

[icrosss lite](https://appshunter.io/ios/topics/icrosss-lite) · [icrosss](https://appshunter.io/ios/topics/icrosss)

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*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 2026-08-25.*