Privacy Policy

Last updated: June 29, 2026

Dune Companion ("us", "we", or "our") operates the Dune Companion mobile application (the "App"). Dune Companion is an unofficial, fan-made reference and Q&A companion about Dune. This policy explains what we collect and how we use it.

1. What we collect

• Questions you ask are sent to our servers to generate a grounded answer and may be processed by a third-party AI provider.
• If you tap feedback (👍/👎), we store the question, answer, and rating to improve quality.
• If you enable the daily-fact notification, we store your Apple Push Notification device token and your preferred notification time and time zone. The token does not identify you personally.
• Chat history and the cached daily fact are stored only on your device and are not uploaded.

We do not collect your name, email, contacts, location, or advertising identifiers, and we do not sell personal data.

2. Third parties

• AI providers (such as OpenAI or Anthropic, depending on configuration) receive your question and retrieved reference passages to generate answers and embeddings.
• Apple Push Notification service (APNs) delivers the optional daily-fact notification.

See each provider's privacy policy for how they handle API data.

3. Subscriptions

Dune Companion+ is an optional upgrade sold and billed by Apple (App Store). Purchases, restores, and cancellations are handled entirely by Apple on your device. We do not receive your payment details. Entitlement status is verified on your device using StoreKit — our servers do not verify subscriptions.

4. Data retention

Push tokens are kept until you disable notifications or uninstall the App. Feedback and aggregate query logs may be retained to improve the service. You can clear on-device chat history in the App at any time.

5. Children

The App is not directed at children under 13 and does not knowingly collect their data.

6. Content and trademarks

Answers are generated from original-authored reference summaries, not from the Dune novels. "Dune" and related names are trademarks of their respective owners; this app is unofficial and not affiliated with or endorsed by the rights holders.

7. Contact us

Questions about this policy? Email inquiries@zaatar.tech.