Amazon has launched its AI-powered shopping assistant, Rufus, for all U.S. customers on the Amazon mobile app. Rufus, located in the app's main navigation bar, helps users find products, compare items, and get recommendations. Initially available in beta, Rufus has been trained on Amazon's product catalog, customer reviews, and other public data. It can answer questions about product features, comparisons, and customer reviews, and even provide suggestions for specific tasks like starting an indoor garden. While Rufus generally performs well, it sometimes struggles with accuracy and is limited to Amazon's catalog. Amazon plans to continue improving Rufus over time.