Euclidea is geometrical puzzles based on classical Euclidian constructions.

> 127 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. Find more useful hints on Euclidea on our site:

“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

Version 4.08

• Level "Isosceles Triangle by Tangent Points" (3.10) moved from Gamma to Mu (12.9).

• Updated the number of moves for minimum solutions:
6.10 "Symmetry of Four Lines"
8.6 "Torricelli Point"
3.10 (12.9) "Isosceles Triangle by Tangent Points"

• Supported Polish languages (thanks to Roman Matuła, Mateusz Zugaj, Dominik Tabisz, and Kuba Wolszczak!).

• Fixed bugs.

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

Ratings and Reviews

4.9 out of 5

268 Ratings

268 Ratings

Great but an exercise in frustration


I concur with all the great reviews here. However, why won’t you just let me know when there is a second solution available for an extra star. The problem is that the definition of “a second solution” is not defined, so if I want to score all the possible stars, I have to spend enormous amounts of time looking for solutions that aren’t there. And sometimes I find a unique solution that apparently the authors didn’t think of so I get no credit.
I understand they want to sell in-app purchases, but I just want the satisfaction of doing it all myself. Please, just let me know if a separate solution exists so I don’t have to spend hours of monotony looking for solutions you don’t consider unique!

Developer Response

V-stars imply different answers but not methods. You can read more in our FAQ: There are hints inside the game (a light bulb in the menu) showing the number of possible answers.



At last I’ve tried the new version of Euclidea.
The synchronization is made thoroughly and properly.
You can progress through levels on different mobile devices,
whatever OS, and while being offline as well
(if the connection is lost).
As soon as you’re connected, all your progress and
constructions will be correctly synchronized.
Everything I’ve been long dreaming of is at last brought
into reality to the utmost.

Simple and engrossing


Challenging puzzles with many constructions I never learned in school. Excellent design work without the time-wasting animations you see in some other apps.

In-App Purchases

Night Mode

Provides access to a dark theme.



129.7 MB
Requires iOS 8.0 or later. Compatible with iPhone, iPad, and iPod touch.
English, Dutch, French, German, Greek, Italian, Japanese, Korean, Polish, Portuguese, Russian, Simplified Chinese, Spanish, Ukrainian
Age Rating
Rated 4+
© 2018 HIL
In-App Purchases
  1. Unlock the Rest Levels $0.99
  2. Unlock the Rest Hints $0.99
  3. Night Mode $0.99


  • Game Center

    Challenge friends and check leaderboards and achievements.

  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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