Editor's Review
In our experience, Euclidea is a brilliant puzzle game that makes geometry feel like play. You're given a compass and straightedge and challenged to construct geometric figures—bisect angles, draw tangents, inscribe polygons—all with the fewest moves.
What' s new ？
Fixed account management.
MOD Info?
Unlimited Hints
Screenshots
euclicdea Official Introduction
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
euclicdea Tips
Let me keep it real—Euclidea by HORIS INTERNATIONAL LIMITED is a super fun Android puzzle game focused on geometry and compass-and-straightedge constructions. It’s not your typical casual game; it’s more like a brain teaser that teaches you basic geometry while you play. Newbies might get stuck at first, but it’s easy to pick up once you get the hang of the tools. I’ve been playing it for a few days, so here’s a no-BS newbie guide and honest take—no fluff, just what you need to start solving puzzles fast.
First off, what’s this game actually do? It’s a geometry puzzle game where you complete constructions (like perpendicular lines, bisectors, or equilateral triangles) using only a compass and straightedge. Core stuff includes 8 chapters of increasing difficulty, step counting (L for lines, E for circles) to get a “Perfect” score, tool unlocks as you progress, and free hints every hour (if you can wait). It’s free to play, but has in-app purchases for extra hints or unlocking locked levels early.
Newbie Tips—I Messed Up So You Don’t Have To:
1. Don’t skip the tutorial. I thought it was boring and skipped it, then spent 15 mins trying to figure out how to draw a simple circle. It’s short and teaches you the basics—total rookie move to skip it.
2. Pay attention to the “L/E” count. Each puzzle has a minimum step goal (like 3L 3E). Don’t just finish it—try to hit that number for a Perfect score. I ignored it at first and missed out on unlocking new tools faster.
3. Use the free hints wisely. Hints reset every hour, so don’t waste them on easy puzzles. I used all mine on a simple level and got stuck later when I really needed them.
4. Don’t overcomplicate things. Start with simple tools (line, circle) before using unlocked ones (perpendicular bisector). I tried to use advanced tools too early and messed up the whole construction.
