Opening the iTunes Store.If iTunes doesn't open, click the iTunes application icon in your Dock or on your Windows desktop.Progress Indicator
Opening the iBooks Store.If iBooks doesn't open, click the iBooks app in your Dock.Progress Indicator

iTunes is the world's easiest way to organize and add to your digital media collection.

We are unable to find iTunes on your computer. To download the free app Euclidea: Geometric Construction Puzzles by HORIS INTERNATIONAL LIMITED, get iTunes now.

Already have iTunes? Click I Have iTunes to open it now.

I Have iTunes Free Download
iTunes for Mac + PC

Euclidea: Geometric Construction Puzzles


Open iTunes to buy and download apps.


Euclidea is geometrical puzzles based on classical Euclidian constructions.

> 120 Levels: from very easy to really hard
> 11 Tutorials
> 10 Innovative Tools
> "Explore" Mode and Hints
> Easily Drag, Zoom & Pan
> Compete with Friends via the Game Center
> No Advertising!

New levels are unlocked as you solve the previous ones. You can complete the whole game only if you earn all the stars (L, E, and V). But you can buy an IAP that removes this restriction.

“Euclidea has been shown to help with imagination, intuition, and logic, all wonderful skills to develop.” – appPicker

“Euclidea is an absolute joy to play…it’s a game that every math student should have and, in an ideal world, every adult should like.” – Non-Trivial Games

***About Euclidea***
Euclidea is a brilliantly original way to learn about, explore and have fun with Euclidian Constructions! Your task is to solve interesting challenges by building geometric constructions with a straightedge and compass. If you design the most elegantly simple solutions in the least number of moves, you’ll earn the highest scores. Solutions are scored in lines (L) and elementary Euclidean constructions (E).

***Start Simple and Get Smarter!***
Don’t worry if you aren’t a math wizard. Euclidea starts out with simple challenges that guide you through the basics. Once you master the fundamentals, you’ll move on to tougher, more mind-bending challenges such as inner/outer tangents, regular polygons, and more. There are 120 unique challenges in total, which are organized in packs for simpler navigation.

***Add Constructions to Your Interface***
When you learn certain significant constructions – such as angle bisectors, non-collapsing compass, and so on – they are automatically added to the Euclidea interface’s shortcut, which helps you save time and allows you to create clean, uncluttered drawings.

***Easily Drag, Pan & Zoom***
Euclidea-created constructions are completely dynamic. As such, you can drag to adjust angles, lines, radii and so on. You can also easily zoom and pan. This not only makes the experience more interactive, but it allows you to more deeply grasp the relationships between geometric elements, explore various possibilities, and analyze errors.

***Instant, Automatic Precision***
Don’t worry about spending time or effort trying to achieve perfect precision, because Euclidea automatically handles that task by pinning points, lines and circles to the app’s clean interface.

***Compete with Friends***
Who said that math isn’t a competitive sport? Challenge your friends to see who can come up with the most elegant solutions, and track your achievements and rankings via the Game Center.

***Additional Special Features***
> A helpful “Explore” mode that allows you to see the figure you need to construct
> An inventory of tools that you create as you progress – you’ll need these to solve future challenges
> Some challenges can be solved in more than one way, which means you can try a different approach and have even more fun

***Questions? Comments?
Send in your inquiries and stay up-to-date on the latest Euclidea news at

What's New in Version 3.14

• Coins were cancelled. As a compensation for those who had coins, we unlocked all the items that could be bought using coins. Please contact us if you have any problems with this feature.
• Supported portrait orientation on iPad.
• Swipe gesture can be used to change packs.
• The initial position of points can be restored when the Hand tool is active.
• The field can be rotated only when the Hand tool is active.
• To skip a level, tap the "Next" button in the menu.
• Game Center can be switched off in the settings.
• Updated the number of moves for minimum solutions:
4.4 "Equilateral Triangle in Circle"
6.8 "Hypotenuse and Leg"
9.6 "Segment Trisection"
9.9 "Ratio 1 to 5"
10.4 "Angle of 54°"
10.5 "Third Parallel Line"
10.6 "Circle in Angle"
10.7 "Geometric Mean of Trapezoid Bases"
10.8 "Regular Pentagon"
10.9 "Angle of 3°"
12.1 "Circle Tangent to Line and Circle"
12.4 "Point Equidistant from Side of Angle and Point"
12.6 "Circle Through Two Points and Tangent to Line"
13.8 "Line-Circle Intersection*"
13.9 "Circle with Center on Line"
• Now you can express your gratitude to us via IAP (choose "Settings -> Thanks to developers").
• Fixed bugs

If you enjoy Euclidea, please leave a nice review on the store. Happy solving!


iPhone Screenshot 1
iPhone Screenshot 2
iPhone Screenshot 3
iPhone Screenshot 4
iPhone Screenshot 5
iPad Screenshot 1
iPad Screenshot 2
iPad Screenshot 3
iPad Screenshot 4
iPad Screenshot 5

Customer Reviews

Ridiculously solid app

It looks like you can complete the game even if you don't pay to unlock every puzzle, although it is extremely challenging to optimize every solution (which is required to advance). But Euclidea is a fun challenge and a really well-crafted app, so I imagine the developer has earned the price tag and then some.

Entertaining in a smart way

The idea of the game is great - and so is the realization! It will keep your fingers glued to the screen for hours: getting all stars may be tricky, but it is definitely rewarding!
I wish more people knew about this game - everybody deserves a chance to try it.

Puzzles I can get behind!

My favorite maths class in school was geometry simply because half of the work felt like puzzles. This game is just math puzzles and little else! It makes you think, and is very well made, and is free. Give it a try!

Euclidea: Geometric Construction Puzzles
View in iTunes
This app is designed for both iPhone and iPad
  • Free
  • Category: Games
  • Updated:
  • Version: 3.14
  • Size: 66.7 MB
  • Languages: English, Russian
  • Seller:

Compatibility: Requires iOS 7.1 or later. Compatible with iPhone, iPad, and iPod touch.

Customer Ratings

Current Version:
All Versions:

Top In-App Purchases

  1. Unlock the Rest Levels$0.99
  2. Unlock the Rest Hints$0.99
  3. Many thanks to developers$4.99
  4. Thanks to developers$0.99
  5. Many, many thanks to developers$49.99