Privacy Policy

KnoBox is developed and operated by The Digital Doctor LLC ("we", "us"). This is a straightforward summary of how KnoBox handles your data — plain-language, not a substitute for formal legal review before wider release.

KnoBox is not fully local. To power AI summaries, tagging, semantic search, and chat, KnoBox sends data to its own cloud backend — this section explains exactly what that means.

What's stored on your device

A full copy of your bookmarks, AI summaries, tags, and chat history is cached locally in this app's own database, so everything stays available offline and stays fast.

What's sent to the cloud, and why

When you save a link, its URL and the page's own text content are sent to KnoBox's backend, which is hosted by Supabase, so it can be fetched, summarized, and tagged. That URL and text, along with your search and chat queries, are sent to Anthropic (Claude AI) to generate the actual summaries, tags, and answers, and the text is sent to Voyage AI to generate the embeddings that power semantic search. Your saved bookmarks, summaries, tags, and chat messages are stored on Supabase's servers too — even if you never sign in.

Every install is scoped by a random device identifier, not tied to your name, email, or any personal profile — using KnoBox this way never requires an account. On the free plan your library is scoped to that one device; syncing across devices is a KnoBox Pro feature.

KnoBox contains no ads, doesn't use Android's advertising ID, and has no analytics SDK.

Signing in (optional)

You can optionally sign in with your email to sync your library across multiple devices (a KnoBox Pro feature). Signing in uses a one-time 6-digit code sent to your inbox — KnoBox never asks for or stores a password. If you sign in, your email address is stored by our authentication provider (Supabase) and used only to identify your account and scope your synced data to it; it's never sent to Anthropic, Voyage, or any other AI vendor, and never used for marketing. Signing in links the bookmarks already saved on that device to your account, going forward and retroactively.

KnoBox Pro

If you purchase KnoBox Pro, the transaction is handled entirely by Google Play — KnoBox never sees or stores your payment details. We receive your purchase's subscription status from Google Play to confirm entitlement, associated with your account.

App Lock

"Require unlock to open" uses your device's own biometric or PIN verification (Android's BiometricPrompt). KnoBox never sees or stores your fingerprint, face data, or PIN — that verification happens entirely within Android's own secure layer and never touches the network.

Crash reporting

Crash reporting is optional and can be turned off in Settings. When it's on, technical crash and diagnostic data (such as the error trace, device model, and Android version) is sent to Firebase Crashlytics, a Google service, to help fix bugs. No bookmark content is included. Turning it off stops collection and discards any report not yet sent.

KnoBox browser extension (Chrome)

Everything above about KnoBox's cloud backend and AI processing applies to the Chrome extension too. This section covers what is specific to it.

Stored in your browser. The extension keeps a random device identifier, your sign-in session (only if you sign in), and a cached copy of your most recent bookmarks, tags and folders in the browser's extension storage on your computer, so the panel opens instantly. It does not keep chat history locally.

Sent to KnoBox. When you save a page or link, the extension sends its URL and which action triggered the save (such as the toolbar button or the right-click menu); KnoBox's backend then fetches the page itself and processes it as described above. When you import browser bookmarks, their titles and folder names are sent as well. When you open the panel, the URL of the current tab is sent to check whether it is already saved; that URL is used only for the lookup, and the page is not added to your library unless you save it. The search terms and questions you type in the panel are sent to KnoBox, and questions are answered with Anthropic (Claude AI) as described above. Every request carries your random device identifier and, if you are signed in, your session token.

Bookmark icons. The panel shows each saved site's icon, loaded from Google's public favicon service (google.com/s2/favicons). Google receives the hostname of each saved site that is displayed in the list.

What it does not do. The extension contains no ads, no analytics and no tracking. It does not read page content, and it only looks at a tab when you click its icon, use its keyboard shortcut, or choose its right-click menu item. We do not sell your data or use it for anything other than saving, searching and asking questions about your bookmarks, and we do not use it to make credit or lending decisions.

Your choices. From the extension you can delete a bookmark (which removes it from the server), export your library, sign out, and, if you are signed in, permanently delete your account from the extension's Settings page. Removing the extension deletes what it stored in your browser; server-side data tied to an anonymous device identifier is not deleted automatically, so email support@knobox.app to request that.

Your choices

Export your library (to JSON on every plan; CSV, HTML, and Markdown with KnoBox Pro), or delete an individual bookmark (which removes it from the server too), anytime from Settings or the bookmark itself. "Clear local cache" only wipes the on-device copy — it doesn't delete anything stored server-side. If you're signed in, Settings lets you permanently delete your account, which removes everything it owns server-side (bookmarks, summaries, tags, chat history, Deep Dives, and your subscription record) immediately and can't be undone. Uninstalling the app without deleting your account first removes everything stored on-device, but server-side data tied to your account or anonymous device identifier isn't automatically deleted — email support@knobox.app to request that.

Contact

Questions about this policy can be directed to The Digital Doctor LLC at support@knobox.app.