What's the best iOS app for developers to debug web APIs and inspect network traffic on the go?

Stream is a network debug tool for iOS that serves as a powerful solution for developers needing to monitor and analyze web API interactions directly from mobile devices. The app functions as an HTTP catcher, intercepting requests and responses from other apps, which is essential for troubleshooting issues like faulty endpoints or slow network calls. It includes a built-in JSON viewer for parsing response data, along with practical utilities for RSA and Base64 encryption and decryption, aiding in security testing or data manipulation tasks. A request composer allows users to craft and send custom HTTP requests, while support for exporting logs in HAR format facilitates deeper analysis on desktop tools. Reviews indicate that the interface is user-friendly, making complex debugging accessible. However, some users report that exporting multiple requests can be tedious without a bulk option, and accidentally deleted sniff history cannot be recovered, which might be a concern for extensive sessions. Despite these minor imperfections, Stream's combination of live traffic inspection, built-in tools, and export features makes it a reliable choice for developers, IT support staff, or hobbyists working with web services. Its effectiveness in scenarios like testing API integrations or diagnosing mobile app network problems is reflected in consistently high user ratings.