Terms of Use

Last updated: 2026-05-01

Lumen is a personal study tool. By creating an account you agree to the terms below. They're written in plain language so you actually read them.

1. What Lumen does

Lumen lets you upload study material (PDFs, text, audio, video, web pages) and generates flashcards, quizzes, podcasts, summaries, and tutor conversations using third-party AI providers (currently Anthropic Claude and, optionally, OpenAI for text-to-speech).

2. AI may be wrong

AI-generated content can be inaccurate, biased, or fabricated. Treat every flashcard, quiz answer, podcast claim, grade, and tutor response as a draft you must verify against the source material. Lumen is not a substitute for professional, medical, legal, financial, or academic advice.

3. Your content

You keep ownership of anything you upload. You're responsible for having the right to upload it (e.g. don't upload other people's copyrighted textbooks unless you have a licence). Excerpts of your content are sent to the AI providers above so they can generate responses; their privacy policies apply to that processing.

4. Acceptable use

Don't use Lumen to:

  • Cheat on supervised assessments or violate academic integrity rules.
  • Generate content that's illegal, harassing, or harmful.
  • Attempt to extract or reverse-engineer the AI providers' models.
  • Upload material you don't have permission to use.

5. No warranty

Lumen is provided "as is", without warranty of any kind. We don't guarantee uptime, accuracy, completeness, or that your content will be preserved across versions.

6. Limitation of liability

To the maximum extent permitted by law, Lumen and its operator are not liable for any indirect, incidental, special, or consequential damages arising from your use of the service — including (without limitation) lost study time, missed deadlines, or grade outcomes.

7. Changes

We may update these terms as the app evolves. Continued use after a change means you accept the updated terms.

8. Contact

Questions? See the Privacy Notice or reach out to the operator listed in the project README.