Skip to main content

GeoGebra

Geometry, algebra and calculus tools in one place, plus a huge shared library of constructions others have built.

Opens in a new tab. We do not control this site and it may have changed since we catalogued it.

How to get the most from it

GeoGebra sits in Science Toys under Learn, filed as coffee break.

  • Set aside five to fifteen minutes and give it your proper attention.
  • It works on a phone or a desktop, so open it on whatever is nearest.
  • It works with the sound off, so it is fine on a train or in a quiet office.
  • No account needed — you can start without signing up.
  • Go in expecting something brainy and useful.

About this category: Simulations you can meddle with: orbits, evolution, chemistry, cellular automata. Understanding through interference rather than through reading.

Good for

  • Filling a coffee break properly
  • Giving your brain a workout
  • Getting something practical done
  • A quiet break at your desk
  • Killing time on your phone
  • Trying it with zero commitment

GeoGebra: quick answers

Is GeoGebra free?

Yes. GeoGebra is free to use and needs no account.

Do I need an account to use GeoGebra?

No. You can use GeoGebra without signing up for anything.

Does GeoGebra work on a phone?

Yes. GeoGebra works on phones as well as desktop browsers.

Is GeoGebra safe for work?

Yes, we file it as safe for work. It also works muted.

How long does GeoGebra take?

We file it as "Coffee break": Five to fifteen minutes of proper attention.

More in Science Toys

All 15 in Science Toys

Same mood: brainy

All brainy sites
  • A three-by-three grid of geographic categories where you name one country per cell and get scored on how obscure it was.

  • The game that made the genre: dropped into Street View, guess where on the globe you are. The free tier is thin these days.

  • A community-built geography quiz mixing street view, flags and country outlines, with private lobbies for a group of you.

  • Long-running newsletter and link hoard for glitch art — tools, artists and the occasional genuinely disquieting find.

Keep exploring

Have a site of your own? Suggest it for Detour or browse the AltFTool backlinks hub.