Euclidea

4.6
89.5K reviews
10L+
Downloads
Content rating
PEGI 3
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About this game

Euclidea is a FUN & CHALLENGING Way to Create Euclidian Constructions!

127 Levels: from very easy to really hard
10 Innovative Tools
"Explore" Mode and Hints
Easily Drag, Zoom & Pan


New levels are unlocked as you solve the previous ones. You can complete the whole game only if you earn all the stars. 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.

***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 https://www.euclidea.xyz/
Updated on
7 Oct 2020

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region and age. The developer provided this information and may update it over time.
No data shared with third parties
Learn more about how developers declare sharing
This app may collect these data types
Personal info and App activity
Data is encrypted in transit
You can request that data be deleted

Ratings and reviews

4.6
83K reviews
A Google user
12 February 2020
Amazing game/interactive geometry problem set. It was made completely free (kudos to developers), only with restrictions that all the stars have to be solved for each challenge in order to proceed to the next level (basically solve using minimum number of steps) . If the game is intended for learning/discovery, I am strongly advocating for unlocking all the levels and playing without trying to achieve the minimal number of steps. PS. I would love to see "Euclidea: Sketches" for android.
27 people found this review helpful
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Sarah Guarino
28 February 2025
I like the idea of learning these things but unfortunately the game just isn't very educational. There's no help section for explaining the UI, no introduction of new concepts. The game just dead drops you into level 1, and every level afterwards, and hopes you'll be able to take the tools (which they haven't explained) and stumble on the answer. If you want to learn, this won't teach you. If you already know the rules, this won't entertain you with challenge. Visually clean, and pleasant.
2 people found this review helpful
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Olivia Gillham
3 February 2025
The game I needed to understand trigonometry 🤯 I wish I'd had this 20 years ago, when I was learning trig in high school and couldn't find an explanation that made it "click" for me the way most other math did. I've just been playing through the game so far, but I can tell that when I next go to memorize a trig rule, I'm going to have a better intuitive understanding of what it *means*, which will mean I can *learn* it rather than just memorizing 🤩
4 people found this review helpful
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What's new

v4.43

• Fixed bugs.

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