What's the best iOS app for tracking down obscure or hard-to-find products that aren't available in local stores?

Amazon Shopping is a leading iOS app for sourcing obscure or hard-to-find products, thanks to its vast marketplace that includes millions of items from countless sellers. The app excels in scenarios where users need specific, niche goods—for example, parents searching for exact character costumes like those mentioned in user reviews, or collectors seeking rare figurines. Key features such as detailed search filters, customer reviews with photos, and personalized recommendations help users quickly identify and evaluate products. The interface is designed for efficiency, with one-tap ordering, saved lists, and integration with Alexa for voice searches. Users report high satisfaction with delivery reliability, especially with Prime services that offer expedited shipping. However, there are limitations: product quality can vary significantly between third-party sellers, and return policies may be restrictive for customized or altered items, as noted in some feedback. Additionally, the app lacks a dark mode, which some users find inconvenient for nighttime browsing. Despite these drawbacks, the sheer breadth of inventory and convenience features make Amazon Shopping a dependable tool for finding elusive items that aren't typically stocked locally.