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Privacy policy

Effective October 13, 2026. This policy covers the Daymark website and Chrome and Firefox extensions operated by Calm Cognition Lab Corp. Contact sree.k@sattva.fyi for privacy questions or deletion requests.
What stays on your device

Automatic reading capture starts off. When you enable it, Daymark checks readable HTTPS pages after focused reading and analyzes their text locally to produce topic labels. It does not copy your browser’s entire history. Excluded sites and pages with password fields are skipped; built-in AI chatbot exclusions cannot be disabled.

Local readings, saved quotes, takeaways, notes, PDF highlights and optional locally indexed passages are kept in extension storage. PDF files selected for ordinary reading are rendered and cached locally. Provider API keys and account session tokens are stored in extension-local storage, not browser storage sync. Local storage is not a password vault.
Account and reading sync

Creating an account or signing in sends your email and password over HTTPS to Supabase for authentication. Daymark uses the resulting session to access your account. Ordinary preferences, such as capture and excluded-site settings, may be backed up and restored for that account.

With capture enabled and a signed-in account, reading records and daily digests are synced through the Daymark API. Records include a client identifier, source URL, title, site, short description, reading date and topic labels. Automatic reading URLs omit their query and fragment. Full page text and PDF files are not uploaded as part of ordinary reading sync. Local PDFs use an opaque document identifier rather than a file path or remote PDF URL.

Saved-text sync is a separate, off-by-default choice. Enabling “Sync saved ideas to my account” uploads existing and future saved quotes, takeaways, notes and PDF highlights, with their source, title and page attribution. Disabling it stops future uploads but does not erase earlier cloud copies.
Optional AI actions and remote PDF links

AI features run only when you choose an action. Using your provider key, selected page text, passages, questions and conversation context are sent directly to Anthropic or OpenAI according to the feature’s disclosure. Page guides send the chosen page’s selectable text, document title and page number. Diagram actions send only the locally previewed image and, for a PDF crop, its title and page. Markdown generation sends selectable text from visited pages and document/page context; saved highlights are added locally to the export.

PDF page guides, diagram explanations, image uploads and generated Markdown are not synced to your Daymark account. Some article chat history is stored locally; library discussions remain in their open tab. A provider receives data you send to it under that provider’s policies. Disabling a Daymark feature does not erase earlier provider requests.

Opening an HTTPS PDF link downloads the document directly from its source without sending cookies. The source sees the network request; Daymark does not sync the pasted link. Private PDF reading avoids new Daymark records and caches for that session, but does not erase earlier records or another service’s logs.
Usage metrics and service logs

Extension usage metrics are optional and off by default. If you enable them, the extension sends bounded action names, such as “popup opened” or “reading sync failed,” to Daymark for aggregate counts. These payloads do not contain reading URLs, titles, passages, questions, PDF identifiers or account identifiers. Firefox also requires its optional technical-and-interaction permission; revoking it blocks these sends.

The website may record bounded interaction events. Hosting, authentication and AI providers necessarily receive network information such as your IP address when contacted and may retain operational/security logs under their policies. Aggregate counts are not the same as individually erasable reading records.
Who processes data and why

Calm Cognition Lab Corp: operates Daymark to provide your reading archive, digest, saved passages and support.
Replit: hosts the Daymark website and API and their operational infrastructure.
Supabase: provides account authentication and account-scoped data storage.
Anthropic or OpenAI: processes only the AI requests you choose to send. An optional connected Claude or ChatGPT client can read account data according to its separately approved consent grant; saved-text access requires a separate permission.
Source websites: serve PDF downloads when you open a remote link.


Daymark does not sell user data or use reading content for advertising. Its use of information received from Google APIs, if applicable, adheres to the Chrome Web Store User Data Policy, including Limited Use requirements. Reading data is used to provide Daymark’s user-facing features, not unrelated profiling.
Permissions and your choices

HTTPS site access lets the extension identify readable pages, save deliberately selected passages and fetch PDFs. Storage keeps local data and settings; alarms schedule sync and recall; notifications announce a digest or a due-idea count without passage text; active-tab access supports user-invoked page actions; downloads saves an explicitly reviewed Markdown export. Daymark does not load remote executable extension code.

Pause capture, exclude sites, disable local passage indexing, turn off metrics or saved-text sync, clear provider keys, or sign out in extension settings. Firefox’s installation disclosure describes data types its account and AI features can transmit; it does not turn these features on or replace Daymark’s separate choices.
Retention, removal and support

Local data remains until you remove it, clear extension/browser storage or uninstall. Cloud copies are separate and are not removed by uninstalling or signing out. Synced saved items can be deleted on the website; account-wide export or deletion requests can be sent to sree.k@sattva.fyi. The publisher may verify account ownership before processing a request.

Private web reading removes the selected page’s local Daymark records and requests account cleanup where needed; the UI reports pending cleanup until the original account confirms it. It does not erase browser history, source-site logs, aggregate counts or past AI requests. Operational backups/logs and third-party retention follow the relevant service’s policies.

Policy changes will be reflected on this page. Material new data uses require an updated disclosure and any applicable consent.
Published by Calm Cognition Lab Corp. sree.k@sattva.fyi