Your writing and stored information
Margin stores note titles and text, note identifiers, creation and update dates, and suggestions you have dismissed so it can avoid repeating them. This information is saved on your device. When iCloud is available, Margin uses Apple's CloudKit service to sync it through your Apple account's private database.
Formatting you apply — headings, emphasis and lists — is stored in a separate record on the device where you applied it. In this release that record is not synced; your note's words travel through iCloud, its styling does not.
Margin has no separate account system, advertising, or analytics SDK inside the app. The app does not track you across other apps or websites. App preferences, such as your chosen mode, remain on the device.
Intelligence on your device
Margin's suggestions use processing on your device. Your writing is not sent to a developer-operated AI service or a third-party AI provider. When Apple Intelligence is available, Margin uses Apple's on-device model; when it is unavailable, built-in rules can offer suggestions. Ask Margin retrieves excerpts from your notes rather than sending questions to an external answer service.
Questions and reflections are ways to revisit your writing. They are not independently verified factual answers. Choosing Focus, Explore or Wonder changes the kind of question asked; it does not change where processing happens.
iCloud, Spotlight and Siri
When iCloud is available, copies of notes and their stored information can exist in your Apple account's iCloud storage and on other devices using that account. Sync depends on Apple's services, connectivity and your settings.
Margin makes note text and related information available to the device's Spotlight and App Intents system so search and Siri can find or act on notes. Your device's search and Siri settings control how those system features surface and use it. Margin currently has no separate switch to disable its system indexing.
Apple's services and privacy terms apply when you use iCloud, Spotlight, Siri, dictation or other system features. Describing Margin's own intelligence as on-device does not mean every action performed by Apple's services stays on your device. See Apple's privacy information.
Diagnostics, support and this website
The app includes local performance timing markers to help diagnose editor behaviour. They contain no note text or note identifiers. Margin has no custom analytics or diagnostic-upload service in the app. Apple's optional system diagnostics are separate and depend on your settings.
If you email eric@thinkmargin.co.uk, Eric receives your address and the information you choose to include, through Gmail. Those messages are used to respond to your request and investigate the issue. Please use fictional examples and avoid sending private writing or sensitive information. You can use the same address to ask about or request deletion of support correspondence. Gmail handles messages under Google's privacy policy.
This information site is hosted with ChatGPT Sites. It has no account form, note editor, contact form or comment system, and it never receives your notes. The hosting provider may process website requests to operate its service under its own policies; see OpenAI's privacy policy. Website hosting is separate from the app's storage of your notes.
On thinkmargin.co.uk, we use Cloudflare Web Analytics to understand visits, page views and page performance. Its JavaScript beacon sends website usage and performance information to Cloudflare, including the pages viewed, referring sites, country, and browser and device type. Cloudflare provides aggregate reports without using analytics cookies, browser storage or fingerprinting to identify individual visitors. This measures use of this website; it does not collect your Margin notes or activity inside the app.
Website analytics provider: Cloudflare Web Analytics. See Cloudflare's privacy policy.
The interactive examples run in your browser. They do not submit your chosen phrases or save your selections.
Questions and updates
For privacy questions, contact Eric at eric@thinkmargin.co.uk. This page will be updated when Margin's relevant data practices change, with the effective date shown above.