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Choose a time. See what was happening around the world.
App preview
Different places, at the same moment in history.
App preview
What do you think will happen? Test your prediction.
App previewHow Theoria works
What changed
people’s minds?
What did people believe before a discovery? What no longer fit? What did the evidence show?
Follow scientists and inventors as they work through a question. See the earlier explanations, the failed attempts, and the evidence that led to something new.
The earlier explanation
What did people believe at the time?
The unanswered question
Which observation did not fit?
The evidence
What supported the idea? What proved it wrong?
What changed
See what the new explanation resolved, and which questions stayed open.
Put the pieces together
See how
ideas connect.
Place an idea in its time. Compare it with other explanations. Look closely at the details, then see how they fit into the wider subject.
Predict what will happen, investigate, and explain the result. Practice helps you remember. Following the reasoning helps you understand.
History · Science · Mathematics · Philosophy
We’re starting with history and science. Other subjects will follow.
Meet the family
Two parents, three kids,
and plenty of questions.
We’re a husband and wife building Theoria with our three children. We fund it ourselves, and the questions we ask as a family help shape the app.
Read our storyPricing
Choose your plan.
Plans for individual learners and schools.
No free trial on the web. Pay when you subscribe. Prices in USD.
Annual
Save 33%$19.99/ month
$239.88 billed annually
Save $120 a year compared with paying monthly.
Subscribe on the webSchools
Custom
Pricing for your school
Help students connect ideas across subjects.
Theoria for schools