ARCA CURIOSA

A LITTLE EVERY DAY. A WORLD TO DISCOVER.

Follow your
curiosity.

From the night sky to the stories that shaped us. Explore what interests you, one thoughtful question at a time.

Explore the library ↗

Coming soon to iOS and Android

THE WORLD IS FULL OF QUESTIONSOPEN A DOOR TO SOMETHING NEW
15 fields of discoveryLearn at your own paceTake your library offline

Your next rabbit hole

Where will curiosity
take you?

Big ideas. Everyday wonders. Choose a familiar favorite or venture into something entirely new.

Earth, Space & Environment

Look a little further.

Explore our planet, its oceans, and the universe beyond.

Science & Nature

Notice the extraordinary.

Get closer to living things and the science of the everyday.

World & Geography

Find a new perspective.

Discover places, maps, and the connections between them.

More than a right answer

Make room for
“Oh, now I get it.”

Arca Curiosa pairs questions with explanations, so every answer is a chance to understand a little more.

  1. Pick a path

    Follow an interest through a topic, from foundations to deeper ideas.

  2. Learn, then look again

    Read the explanation. Revisit missed questions with spaced review.

  3. Take it with you

    Study bundled and downloaded topics offline, wherever the day takes you.

Inside Arca Curiosa

A closer look at
your next discovery.

Actual app screens: a question to explore, an explanation to understand, and a path to keep going.

Health question with a digestive system illustration and four organ choices.
01

See what you’re learning

Illustrated questions bring the subject into focus.

Jupiter selected as a gas giant, with an explanation and bookmark and review controls.
02

Understand the answer

Read the why, bookmark a question, or save it for review.

Earth, Space and Environment learning path showing completed Discover and Explore stages and Challenge progress.
03

Find your next step

Follow your progress and resume an untimed session when you’re ready.

Screenshots shown in English. Switch the site language for Spanish descriptions.

ARCA CURIOSA PLUS

For the endlessly
curious.

Start with the free core library. With Plus, make more room for discovery through additional downloadable topics.

Plus is an optional paid subscription. Store availability and subscription details will be shared at launch.

A library that grows with you

  • More topics across the 15 categories
  • Download once, explore offline
  • New weekly topics planned after launch

Stay curious.
Your library travels with you.

Coming soon to iOS and Android.

Get in touch ↗