Price History Checker for Online Shopping

A personal developer tool that helps Chinese consumers track and visualize historical price data across major e-commerce platforms including JD.com, Tmall, Taobao, Pinduoduo, Amazon China, Suning, Dangdang, Koala, Yanxuan, and Gome. Users paste a product URL and the system generates a price trend line chart showing whether merchants are running genuine discounts or fake promotions. The current price and historical lowest price are displayed side by side, helping shoppers identify the best time to buy. Beyond simple price comparison, this tool focuses on detecting false discount patterns such as artificial price hikes before fake sales events. The website also offers a mobile app available in all major Chinese app stores, enabling convenient price checks while shopping on the go. The developer maintains a feedback email address for user suggestions and bug reports. Since launching, the tool has helped thousands of Chinese shoppers avoid deceptive marketing tactics during major shopping festivals like Singles' Day and 618.