Last updated: July 23, 2026
Amazon Sales Spy ("the extension") is a browser extension that displays estimated sales, publish dates, and review counts on Amazon product listings.
Email address (subscribers only). When you subscribe, payment is handled by ExtensionPay (extensionpay.com) and Stripe (stripe.com). Your email address and payment details are collected and processed by those services to manage your subscription and let you sign in on other devices. We never see or store your full payment card details.
Subscription status. The extension stores your subscription status locally in your browser so it knows whether to display sales badges.
All sales estimates are computed locally in your browser from information already visible on the Amazon page you are viewing. Nothing about the pages you visit is transmitted to us or anyone else.
We do not sell, rent, or share any user data with third parties beyond the payment processors named above.
You can cancel your subscription anytime via "Manage subscription" in the extension popup. To request deletion of your payment record, contact us at the email below.