Your data stays yours.

1. Who we are

Feynman Flashcards ("FeynmanLM", "the app", "we", "our") is an independent app developed by Maarten de Vries. Contact: support@feynmanlm.app.

2. Data we do not collect

We operate without any backend server that stores user data. This means:

• We do not collect, store, or have access to your flashcards, decks, or tags.
• We do not collect your study history, review outcomes, or learning progress.
• We do not collect the content of sources you add (articles, papers, PDFs, podcast transcripts).
• We do not collect your AI provider API keys (stored in the iOS/macOS Keychain on your device).
• We do not collect voice recordings or transcriptions.
• We do not run advertising, behavioral tracking, or cross-app analytics.

3. Where your data is stored

All app data is stored in your private iCloud container (com.feynmanlm.flashcards). This includes:

• Flashcard files (one Markdown file per card)
• Reading list and source queue state
• Podcast transcripts and book PDFs you add
• Studio artifacts and knowledge-base state
• Proposal queue history

iCloud storage is governed by Apple's Privacy Policy at apple.com/legal/privacy. Data is encrypted in transit and at rest by Apple.

Your API keys (Anthropic, OpenAI, Groq, Gemini) are stored in the iOS/macOS Keychain and never leave your device except when used to authenticate requests directly to those providers.

4. Third-party AI providers

FeynmanLM sends content to third-party AI providers directly from your device — not through our servers. You configure which provider to use in Settings. The content sent includes:

• Flashcard questions and answers (for rephrasing and evaluation)
• Source text excerpts (when source context is enabled during review)
• Your typed or transcribed answer text
• Prompts for flashcard generation from articles and PDFs

Each provider has its own privacy policy and data retention practices:

You are not required to use all of these providers. You choose which provider handles each task in Settings. If you do not configure a provider's API key, the app does not send data to that provider.

5. Microphone and voice input

FeynmanLM requests microphone access to support voice-based flashcard review. When you use voice input:

• If you use Apple's on-device speech recognition (the default option), audio is processed entirely on your device and never transmitted.
• If you configure a cloud speech-to-text provider (OpenAI Whisper, Groq, Deepgram, or others), your audio is sent to that provider's servers for transcription. Audio is not stored by the provider beyond the time needed to return a transcript (per each provider's policy).

We do not store, transmit, or have access to your audio recordings or voice transcriptions at any point.

6. Sign in with Apple

FeynmanLM uses Sign in with Apple for authentication. When you sign in:

• We receive an anonymous, app-specific user identifier from Apple.
• We do not receive your name or email address unless you explicitly choose to share them during sign-in.
• If you choose to share your email, Apple may provide a relay address that forwards to your real email.
• This identifier is used only to associate your in-app purchase and subscription status with your account.

Sign in with Apple authentication is governed by Apple's Privacy Policy.

7. In-App Purchases and Subscriptions

Purchases and subscriptions are handled entirely by Apple's App Store. We do not collect or process payment information. Apple does not share your payment details with us.

We may receive from Apple: your Apple-assigned user identifier, country/region, and subscription status. We use this only to unlock app features and do not share it with third parties.

8. Analytics and crash reporting

FeynmanLM does not integrate any third-party analytics SDK (such as Firebase, Mixpanel, or Amplitude).

If you have opted in to sharing analytics with app developers in your iOS or macOS settings, Apple may provide us with aggregated, anonymized crash reports and basic usage metrics. This data does not include personally identifiable information. You can opt out in Settings → Privacy & Security → Analytics & Improvements.

9. Safari Reading List and local file access

On macOS, FeynmanLM can read your Safari Reading List bookmarks to automatically surface recently saved articles. This data is:

• Read locally from ~/Library/Safari/Bookmarks.plist
• Never transmitted to us or to any server
• Used only to populate the Studio source queue on your device

This feature requires you to grant Full Disk Access in macOS System Settings. You can revoke this permission at any time.

10. Children's privacy

FeynmanLM is not directed at children under 13. We do not knowingly collect personal information from children under 13. If you believe a child under 13 has provided information through the app, please contact us at support@feynmanlm.app.

11. Data retention and deletion

Since we store no data on our servers, there is nothing for us to delete on your behalf. Your data exists only in:

• Your iCloud account — delete via iCloud Drive or reset the app's iCloud container in iOS/macOS Settings → [your name] → iCloud → Manage Storage.
• Your device Keychain — API keys are removed when you delete the app.
• Third-party AI providers — follow each provider's data deletion process per their privacy policies linked in Section 4.

12. Changes to this policy

If we make material changes to this privacy policy, we will update the effective date at the top of this page and, where appropriate, notify users within the app. Continued use of the app after any changes constitutes acceptance of the updated policy.

13. Contact

Questions or concerns about this privacy policy?

Email: support@feynmanlm.app
Website: feynmanlm.com