比一比—网购货比三家 is a Chrome extension that offers automatic coupon collection, price comparison, and historical price tracking. When browsing product pages, it automatically displays historical prices, compares similar products, and provides hidden coupons for major online shopping platforms.

The core features include tracking historical prices to identify false promotions, comparing prices from multiple sources to prevent overpaying, highlighting hidden coupons for potential savings, and supporting price comparison on popular websites such as Taobao, JD, and Amazon.

The extension assures user privacy by stating that it does not collect personal information, only basic product interaction data to enhance the product. It includes affiliate rebate links from platforms like Taobao, JD, Vipshop, and Amazon.