🧠 Feynman AI · Free, no sign-up

Learn anything by teaching it to an AI

The Feynman Technique says you only truly understand something when you can explain it simply. Feynman AI is your patient student β€” teach it, and it finds the gaps you didn't know you had.

Start teaching β†’ or try Tether & CogniCard

How it works

Pick a topic and a β€œstudent” β€” a curious child, a peer, or an expert. Then teach it out loud (by voice) or by text. As you explain, the AI plays that student and asks Socratic follow-up questions that surface the parts you glossed over. When you're done, it scores your fluency and subject mastery, and saves the session so you can watch yourself improve.

What's inside

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Teach by voice or text

Speak naturally β€” it transcribes β€” or just type. Whatever helps you think.

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Socratic questioning

The AI probes exactly where your explanation is fuzzy, like a good tutor would.

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Fluency + mastery score

Two-dimensional feedback, plus a history so you can track progress over time.

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Reads your notes

Upload a photo of your notes or textbook and teach straight from them.

Who it's for

Students revising for exams, anyone learning something new, and curious people who want to really understand β€” not just re-read. Built by a high-school student who was tired of β€œI read it but can't explain it.”

Try Feynman AI β†’ Free Β· works on phone & desktop Β· English / δΈ­ζ–‡ toggle inside