Feynman — Privacy Policy

Network Working Group                                       N. Chong
Request for Comments: 0001                                 Feynman App
Category: Informational                                  18 Feb 2026

1. Overview

Feynman is an iOS application that helps you understand documents and notes using AI. This policy describes what data is collected, how it is processed, and with whom it is shared.

2. Data We Collect

Feynman collects only what is necessary to provide its core function:

• Note and document content — text you write or import into the app. This content is sent to our AI proxy when you request an explanation or ask a question.
• App usage data — crash reports and basic usage events to improve stability. This data does not include your note content.

We do not collect your name, email address, or any account information.

3. How Your Data Is Processed

When you request an AI response, your note content is transmitted over HTTPS to our proxy server (ai.niccho.dev), which forwards it to Anthropic's API for processing. The proxy does not store your content. Responses are returned directly to your device.

Your notes are stored locally on your device using Apple's iCloud sync infrastructure. We do not operate our own database of user notes.

4. Third-Party Services

• Anthropic — AI model provider. Note content sent for processing is subject to Anthropic's Privacy Policy. Anthropic does not use your data to train its models by default.
• Cloudflare — Our proxy runs on Cloudflare Workers. Cloudflare may log request metadata (IP address, timestamps) in accordance with their Privacy Policy.
• Apple iCloud — Note data synced across your devices is subject to Apple's Privacy Policy.

5. Data Retention

Note content sent through our proxy is not retained after the API response is returned. Local note data persists on your device and in iCloud until you delete it.

6. Your Rights

You may delete your notes at any time from within the app. Since we do not store your note content on our servers, deletion from your device is sufficient to remove it from our systems.

7. Children's Privacy

Feynman is not directed at children under 13. We do not knowingly collect data from children under 13.

8. Changes to This Policy

We may update this policy. The effective date at the top of this page will reflect the most recent revision. Continued use of the app after changes constitutes acceptance of the updated policy.

9. Contact

Questions about this policy can be sent to: nchong128+feynman@gmail.com