# GeoCon HD

> Interactive iPad game for learning and practicing plane geometry constructions. (iPhone/iPad app by Oleh Yudin.)

- Source: https://appshunter.io/ios/app/geocon-hd/id919438593 (this page in markdown: same URL + `.md`)
- Developer: [Oleh Yudin](https://appshunter.io/developer/381844540)
- Category: Games, Education, Puzzle
- Price: Free with in-app purchases
- Rating: 5.00/5 from 1 App Store ratings · 38 written reviews indexed
- Age rating: 4+
- Requires: iOS 12.0 · 49 MB
- Languages: English, Japanese, Russian
- Released: 2014-11-05
- Data updated: 2026-06-09
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/geocon-hd/id919438593/reviews.md

## What is GeoCon HD?

GeoCon HD is an educational game for the iPad. It is useful for students, teachers and math enthusiasts studying plane geometry since the geometric constructions of GeoCon HD are one of the most interesting and exciting areas of geometry. With GeoCon HD you will literally create and touch various constructions with your finger. In this way, an important part of geometry is made both tangible and interactive. It can even be fun!

Resolve construction tasks, discover new levels, gather achievements, compete with your friends and increase your mathematical reasoning skills and understanding with GeoCon HD. Have fun and learn at the same time!

Features:
    - 38 levels in 4 categories provide something for everyone from a beginner to a skilled student
    - levels can be completed in a multiple different ways – GeoCon HD is flexible!
    - hints, user-friendly solutions and guidance are available in the app – GeoCon HD is a helpful and provides guidance.
    - move, scale and rotate the canvas, and also move points to get a different perspective on the level. Of course, you can undo and redo any of your construction steps, so that new approaches can be tried without any stress. 
    - a Practice Mode is also available, providing a learning environment without the pressure of Game Mode
    - achievements are available in the Game Center, providing a level of friendly competition.


Details:
Easy tutorial steps will teach you the basic geometric constructions: setting and moving points, constructing lines and circles, creating intersection points.
After the tutorials, there are 38 challenging levels with different complexity, which makes the game interesting for everyone no matter what their skills in geometry currently are. 
All game levels are divided into four categories: Basic constructions, Line segments, Triangles and Circles. Completing these first levels provide you with new construction tools. These new tools make the completion of more complex levels less tedious – the same way a professional mathematician works. 
As a reward for each level you will get a silver or golden medal. The golden medal is given for each level solved through a minimum possible number of moves. Stuck on some level or just want to find out how to solve it with the minimum number of moves? GeoCon HD provides hints for each level. If needed, in-app purchases can provide you with additional hints.
Game achievements are available for you in the Game Center. Compete with your friends in gathering these achievements. Some game levels have multiple solutions, and finding these additional solutions to a level will provide you with even more achievements 
A Practice mode is also available. In Practice Mode all construction tools are available. You can use Practice Mode for studying the construction tools and resolving your own ideas prior to entering Game Mode.

## Key features

- Interactive geometric constructions
- 38 levels in 4 categories
- Multiple solution paths
- Hints and user-friendly guidance
- Practice Mode
- Game Center achievements

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Three keys for levels unlock | $0.99 | one-time |
| Unlock all game levels to play | $0.99 | one-time |


## Recent user reviews (10 of 38)

All indexed reviews: https://appshunter.io/ios/app/geocon-hd/id919438593/reviews.md

### 4/5 — 面白いです。

*2019-09-19, version 1.7*

数学好きにはたまらなく面白いです。難易度は高いかな
以下改善してほしい点です。

・横向きに表示ができるようにしてほしいです。
・作図の線の長さ等が調節できるようにして済してほしいです。
例えば、長さを計り取りたいだけでなのに、毎回円全体が作図されてしまうのは不便です。また図全体がゴタゴタしてしまい、見にくくなります。
・数学の指導に使いたいので、作図の際にコンパス、定規が表示されて、どの点に針を当てて描画しているのか、どの点とどの点を結んで直線を描いているのか等、実際の作図の様子がわかるようにしていただけるとすごくありがたいです、

### 1/5 — П

*2018-12-10, version 1.7*

Олех Иудин, почему изображение не переворачивается если держать iPad динамиком вверх то есть когда кнопка home сверху? Сложно что ли сделать? Прошлый век

### 4/5 — ダブル課金？

*2018-04-28, version 1.7*

IPadで有料版を購入したのですが、iPhoneでは別途有料版を買わないといけない仕様のようで、それが残念です。

### 5/5 — Отлично

*2016-05-21, version 1.5*

Все классно, больше уровней, игра просто замечательная!

### 5/5 — Отличная игра!

*2016-05-18, version 1.5*

Прекрасная идея, замечательно сделана.

### 5/5 — Можно было сделать и подороже)

*2016-04-26, version 1.5*

Настолько классно, что я только с менюшкой игрался минут 5;)

### 5/5 — Great puzzles!

*2016-04-09, version 1.5*

And it's challenging to find a solution for a gold prize!
The minor inconvenience is the game is unable to work in upside-down screen orientation

### 5/5 — Просто гениально!

*2015-12-28, version 1.5*

Эта игра снова заставила меня начать играть! Очень интересно и познавательно. Заставляет шевелить мозгами. Очень полезно тем, кто уже забыл что такое геометрия.
Спасибо разработчикам! Может в следующем обновлении появится легкая и ненавязчивая музыка? Было б совсем отлично! Хотя и так все устраивает!

### 5/5 — Brilliant App

*2015-12-26, version 1.5*

I like everything about this app.  It makes geometry into a challenging but accessible puzzle game.  Solved puzzles become new tools for use in subsequent puzzles.  The interface is pleasant and usable.  This should be an accessory to high school geometry class.  This will become part of my app "hall of fame" collection.  I hope it wins a prize for being an outstanding educational app.

### 5/5 — Incredibly Addictive

*2015-06-09, version 1.4*

Bridges the gap between educational and recreational. A perfect game.

## Frequently asked questions about GeoCon HD

### What is GeoCon HD?

GeoCon HD is an educational game designed for the iPad that focuses on plane geometry. It allows users to interactively create and manipulate geometric constructions with their fingers, making abstract concepts more tangible and engaging. The app aims to improve mathematical reasoning skills through problem-solving and exploration.

### What are the key features of GeoCon HD?

GeoCon HD offers 38 levels across four categories, providing a progressive learning experience. It features interactive construction tools, multiple ways to solve levels, hints and guidance, a practice mode for experimentation, and Game Center achievements for friendly competition. Users can also manipulate the canvas and undo/redo steps.

### How much does GeoCon HD cost?

The app is free to download and use, with in-app purchases available for additional hints. This allows users to access the core learning experience without an upfront cost, with optional purchases to assist in overcoming challenging levels.

### What are the use cases for GeoCon HD?

GeoCon HD is ideal for students studying plane geometry, teachers looking for interactive teaching tools, and math enthusiasts who enjoy geometric puzzles. It can be used for learning basic constructions, practicing complex problems, exploring different solution methods, and developing a deeper understanding of geometric principles.

### Is GeoCon HD compatible with my device?

GeoCon HD is specifically designed for the iPad. Its interactive features and canvas manipulation are optimized for the larger screen and touch interface of Apple's tablet devices, providing the best user experience for learning geometric constructions.

## Version history (last 5 releases)

### 1.8 — 2022-07-29

minor updates and fixes

### 1.7 — 2017-12-18

This app has been updated by Apple to display the Apple Watch app icon.

-added Japanese translation
-level 4.9 improved minimum steps required
-minor fixes and improvements

### 1.6 — 2017-04-11

- free text hints are added to the levels

### 1.5 — 2015-11-30

-added ability to share the challenges via Facebook to ask for help, discuss or just tell your friends how smart you are
-GeoCon remembers levels unlocked with the key. No need to use another key to see the solution again
-updated optimal solution for level 3.4, 4.6, 4.12
-minor fixes and improvements

### 1.4 — 2015-03-04

-removed view actions (scale, translate, rotate) from undo/redo list
-minor improvements and fixes

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## More apps by Oleh Yudin

- [iCrosss](https://appshunter.io/ios/app/icrosss/id431653759)
- [iCrosss Lite](https://appshunter.io/ios/app/icrosss-lite/id509927782)
- [GeoCon](https://appshunter.io/ios/app/geocon/id919438041)

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

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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 2026-06-09.*