Privacy Policy: Real Profit: Etsy Margin Calculator

Last updated: 2026-07-11

Real Profit: Etsy Margin Calculator ("the extension") shows your real net margin on Etsy listings after fees and production cost. This policy describes exactly what the extension's code does with your data.

Data collected

• Your production-cost presets and selected preset. Stored in chrome.storage.local on your device only (src/content/content.ts, PRESET_STORAGE_KEY / SELECTED_PRESET_KEY, read/written via src/lib/storage.ts). Never transmitted anywhere.
• Panel-dismissed timestamp, used to remember you closed the panel for 24h (PANEL_DISMISSED_KEY). Stored locally in chrome.storage.local.
• License/paid-status cache from ExtensionPay (see below), stored locally (src/lib/license.ts, LicenseCache) so Pro status survives a temporary ExtensionPay outage for up to 90 days.
• Listing price, shipping cost, and (for the Shop Manager bulk export) row titles are read from the Etsy page's own DOM (src/content/content.ts, runListingPanel/runBulkAudit) purely to compute your margin locally. The bulk-export CSV is generated and downloaded directly to your device via a local Blob (downloadCsv), it is never uploaded or sent to any server.

Data NOT collected

• No analytics or telemetry of any kind.
• No account, sign-up, or email address is required or collected (the popup UI states this directly: "No subscription. No account. No data leaves your browser.").
• No cookies are read or set by the extension.
• The extension only runs on https://www.etsy.com/* (see manifest.json host_permissions/content_scripts), it cannot access any other site.
• Etsy listing data, prices, and shop content are never sent off your device; all margin calculations run locally in src/lib/profit-calc.ts.

Third parties

• Selector configuration (data only). The extension fetches a small JSON file of CSS/text selectors and current Etsy fee rates from https://sebastian-code-automation.github.io/ducens-watchtower/selectors.json (src/lib/selectors.ts, getSelectorsDocument), cached for 24h. This is a plain GET with no user data attached, used only to keep the extension working when Etsy changes its page markup or fee schedule. If it fails, the extension falls back to a selectors file bundled with the extension package.
• ExtensionPay (extensionpay.com). The extension uses ExtensionPay as a third-party payment processor to sell the one-time Pro upgrade and to check whether your installation has paid (src/lib/license.ts). This involves your browser communicating with extensionpay.com (and Stripe as ExtensionPay's own payment processor) to open the payment page and verify paid status. The extension itself does not send your Etsy listing data, presets, or margin figures to ExtensionPay, only what ExtPay's own library needs to identify your installation. See ExtensionPay's own privacy policy at https://extensionpay.com/privacy.html for what it collects.

Contact

Questions about this policy: sebastian.stephen.dominguez@gmail.com

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