Margin: Read with Claude · Delancey Labs LLC
Effective October 18, 2026
Margin privacy policy.
This policy covers Margin: Read with Claude for iPhone, iPad and Mac, published by Delancey Labs LLC (“we”).
- There’s no Margin account. We don’t ask for your name or email address.
- Your library is stored on your devices and in your private iCloud database. We can’t see it.
- When you use an AI feature, the text it needs goes through our server to the AI provider that does the work. Our server passes it along and doesn’t keep it.
- No ads, no tracking, and no third-party analytics.
Your library
What you save in Margin stays with you: articles, posts, threads and PDFs, their images, your highlights and notes, your conversations with Claude, Briefs, explainer images and videos, tags and reading progress. Margin also keeps a record of the AI requests you’ve made and their estimated cost. All of this is stored on your device and synced through your private iCloud (CloudKit) database, which belongs to your Apple Account and is managed by Apple. Delancey Labs has no access to it.
Some things stay only on the device where they were made: narration audio, the search index used to answer questions across your library, and your settings.
Saving articles
When you save a link, Margin downloads the page and its images directly from the website, the way a browser would, so that website sees a request from your device. Posts, threads and X Articles from X are fetched through FxTwitter (api.fxtwitter.com), a public third-party service that receives the address of the post. For YouTube links, Margin asks YouTube for the video’s title, description and captions. On iPhone and iPad, Safari’s Share sheet can also hand Margin the page as you see it. None of this passes through our server.
AI features
Margin’s AI features run through our server, a Cloudflare Worker operated by Delancey Labs. It checks your subscription, applies daily limits, and forwards each request to the provider that does the work. Only the content a feature needs is sent, and only when you use it (or, for search and transcripts, when Margin prepares those features for you):
| Feature | What is sent | Provider |
|---|---|---|
| Ask, Explain, Brief, tags, and questions across your library | Your question, the article’s text or the passage you selected, the conversation so far, and for library questions, relevant passages from your other saved articles | Anthropic (Claude). If Claude searches or reads the web for an answer, Anthropic does that. |
| Explainer image | A description of the image, with the article’s title, byline, Brief and text | OpenAI |
| Explainer video | The article’s text, so Claude can write the segment, then the written segment | Anthropic (Claude), then OpenRouter, which renders it with MiniMax Hailuo |
| Listen | The paragraph being read and a little of the text around it | ElevenLabs |
| Search across your library | Short passages of your saved articles and your search question, to build the search index | OpenRouter (Qwen3 embeddings) |
| Transcripts for videos in X posts (can be turned off in Settings) | The video’s audio, in short segments | OpenRouter (Microsoft MAI-Transcribe) |
Our server passes requests and results through without storing their content. With each request it gives the provider a pseudonymous ID, the App Store’s ID for your subscription, which providers use to detect abuse. Each provider processes requests under its own terms and privacy policy and may keep them for a limited time, for example for safety monitoring. The results, such as answers, images, audio and videos, are saved in your library.
What our server keeps
Our server knows your subscription only by the ID Apple assigns to it, not by your name, email address or Apple Account. Against that ID it keeps:
- counts of today’s usage for each feature, to apply daily limits; these are deleted after about two days;
- your balance of extra credits, and the IDs of credit purchases already added, so each purchase counts once;
- the IDs of explainer videos you start, so only you can check on and download them.
If you ask to be notified when a video is ready, the server also keeps your device’s push notification token, the article’s title and an internal article ID until the notification is sent through Apple Push Notification service. The rendering service tells our server when a video is finished; the finished video is downloaded through our server to your device, and our server doesn’t keep a copy.
Cloudflare, which runs the server, keeps short-lived operational logs of requests and errors, which we use only to keep the service running. We don’t log the content of your requests.
Subscriptions and purchases
Subscriptions and extra credits are sold and billed by Apple through the App Store. We never see your payment details, name, email address or Apple Account. To prove that you’re subscribed, Margin sends the signed App Store transaction with each AI request, and our server checks Apple’s signature on it.
X bookmarks
Connecting X is optional. It uses your own X developer app: you sign in on X’s own page, and Margin stores the resulting access, your app’s Client ID, and your X user ID and username in your iCloud Keychain, so your other devices are connected too. Margin reads your bookmarks directly from the X API; they don’t pass through our server. Choosing Disconnect in Settings removes these credentials. X’s own terms and privacy policy apply to your use of X and of your developer account.
On a Mac
The Margin extension for Safari only acts when you use it: clicking its button, pressing its shortcut, or choosing Save Link to Margin. It passes the page or link to the Margin app on your Mac. If you turn on Connect AI Apps, Margin runs a server on your Mac, reachable only from that Mac and protected by a secret address, so AI apps you connect there can read and add to your library. Those apps handle what they read under their own policies. It’s off until you turn it on.
Permissions
Margin asks to send notifications only if you ask to be notified about a video, and to add to your photo library only when you save an explainer image. You can change these in your device’s Settings.
Deleting your data
- Delete an article in Margin, and it’s removed from your library on all your devices, with its conversations, highlights and media.
- To delete everything Margin stores in iCloud, go to Settings › [your name] › iCloud › Manage Account Storage › Margin on iPhone or iPad, or System Settings › Apple Account › iCloud › Manage on a Mac, and delete its data. Then delete the app from each device to remove what’s stored locally.
- Disconnect X in Margin’s Settings to remove your X credentials.
- Usage counts on our server expire on their own. To have your credit balance and video records removed, email us; deleting them also removes any unused credits.
You can export your library at any time with Export Library in Margin’s Settings.
Children and changes
Margin isn’t directed to children, and we don’t knowingly collect personal information from children. If Margin’s data practices change, we’ll update this policy, its effective date and the App Store privacy information.
Contact
Questions about privacy: mick@delanceylabs.com. Publisher: Delancey Labs LLC, New York. Website privacy is covered by our website privacy notice.