Privacy

The iOS app and optional AI features

Bookmarks, interests, and saved workspace connections stay on your device. The iOS app does not require an account or include advertising tracking. Conversations are kept in memory and are not saved by the app between launches.

When you use AI features, your questions, conversation context, selected pages, and any files or photos you submit are sent to our server and processed by OpenAI through Vercel AI Gateway to generate a response. Research searches may send derived topic queries to Exa and Europe PMC. The iOS app asks for permission before you use these features. You can withdraw permission in Settings and continue browsing without AI. Avoid sharing medical records or other sensitive personal information.

Requests also pass through hosting and infrastructure services. Operational records and AI provider handling are subject to those services’ privacy practices. Closing the app does not necessarily delete records held by those services. See OpenAI’s privacy policy and Vercel’s privacy policy.

Dictation uses Apple’s speech recognition on the device when supported. Otherwise Apple processes audio after you grant speech and microphone permission. A transcript is sent to the Guide only when you submit a question. Public images and 3D models may be cached on the device.

Use our contact page for a privacy request.

Analytics

When analytics are configured, they load only after you choose to allow them. We use aggregate page, engagement, product-click, and performance events to understand which content helps readers. With consent, eligible merchant-click events may also be recorded on our server so we can reconcile commissions; these events use product, page, and campaign fields plus a random event ID, not your name, email, IP address, health profile, chat text, or form response.

Your preference

Your analytics choice is stored in your browser. Clearing site storage resets that choice. Declining analytics does not limit access to the site.

Third-party destinations

Links to retailers, studies, and other sites are governed by those sites’ privacy practices.

Reader contributions

If you submit a product, book, or podcast review or comment, we use your email address to verify contribution access and keep it private. Your public display name and published contribution are shown on the relevant page. We may retain moderation and abuse-prevention records for as long as needed to keep the community safe, but we do not send review text, email addresses, or health details to analytics or the Guide’s scientific evidence systems.

You can ask us to remove a contribution or contact details associated with it. Published content may remain in anonymized form when needed to preserve the integrity of a moderation record.