XSection

Name: XSection
Author: HORIS INTERNATIONAL LIMITED

1.21

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HORIS INTERNATIONAL LIMITED

4.51100K+ installs

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Learn how to construct cross sections of polyhedra.

XSection: Solid Geometry Cross Section Puzzles

By Priya Raghavan

Senior reviews editor

More than 100 tasks spread across 11 chapters
Cross sections of prisms, pyramids and tetrahedrons
Blocks constructions that would be geometrically impossible
Built-in glossary of geometric terms
Step-by-step instructions and theory for each problem
Parallel and central projection, traces and inner projection methods

What XSection trains and who it is for

XSection is a solid geometry trainer. Its aim, on the listing's account, is to help you read two-dimensional drawings of polyhedra, lines and planes in 3D space. The developer presents it as a way for students to practice before tests and exams, and as a way to build spatial imagination.

The listing says every problem can be solved without complex calculations. The work is about seeing where a plane cuts a solid, not about long arithmetic.

Constructing cross sections of solids

The main topics are prisms, cubes, parallelepipeds and cuboids, along with pyramids and tetrahedrons. Within these shapes, the tasks cover cross sections, diagonal sections and the diagonals of polyhedrons.

The app stops you from building an impossible object. The listing gives the example of trying to intersect skew lines, a common mistake when drawing cross sections on paper.

Projection methods for spatial problems

Beyond cross sections, the topics include parallel and central projections. The listing also names the method of traces and the method of inner projection as techniques the tasks use.

These methods are the harder end of the content, which the listing describes as moving from basics to challenges across its 11 chapters and more than 100 tasks.

Step-by-step help and the built-in glossary

Each task comes with step-by-step instructions, and the app includes the theory facts needed for the problems along with explanations. If you forget a definition, a built-in glossary of geometric terms is available within the app.

Because the glossary and theory sit inside the app, you can check a term without leaving the problem you are working on.

What's new

May 19, 2026

* Improved app stability and compatibility with newer Android versions.
* Improved purchase and unlock reliability.
* Glossary and rule animations now work better offline.
* Improved theme/language switching and screen layout behavior.
* Reduced app size.

About this APK

The build we hold is XSection 1.21 (APKS split bundle) for Android 6.0 and up.

Version: 1.21; 28
Requires Android: 6.0+

Package ID: com.hil_hk.xsection
Format: APKS split bundle
Malware scan: Google Play Protect
Permissions: 4 declared
Signed by: CN=Mikhail Koroteev, O=HIL
Certificate SHA-256: 66fb9391055eaec6bad766433026f95c4d3d901390cb019ba8457989dd8e6ea7