CashCatch is private by design. The extension runs entirely on your device: the cards you select are stored only in your browser's local storage (card names only, never card numbers), there is no account, and we do not collect, transmit, or sell any personal data or browsing activity. The extension's only network request is a read-only download of a public card-rewards dataset from getcashcatch.com, which contains no information about you. When you open the popup, the current tab's domain is read locally to match it to a store and is never transmitted. Full policy: https://getcashcatch.com/privacy