What's the best iOS app for debugging and inspecting HTTP requests on my iPhone?

ProxyPin is an open-source iOS application that specializes in capturing and inspecting network traffic, making it a top choice for debugging HTTP requests on iPhones and iPads. The app functions as a local proxy, intercepting and logging all HTTP and HTTPS traffic from the device, which allows users to view detailed request and response headers, bodies, and timing. This is particularly useful for developers building or testing mobile applications, as it enables real-time monitoring of API calls to identify issues like incorrect data formats or slow response times. For instance, a developer troubleshooting a bug in a social media app could use ProxyPin to check if login requests are being sent properly or if server responses contain errors. The app's open-source nature means the code is transparent and community-vetted, while its lack of ads and in-app purchases aligns with a clean, focused user experience. Reviews indicate that users appreciate the straightforward interface, which includes filtering options to sift through traffic by domain or keyword, and the ability to export logs for further analysis. However, some might find the initial setup—which involves configuring a proxy on the device—a bit technical for beginners, and it doesn't offer advanced features like automated testing scripts found in desktop alternatives. Despite these minor hurdles, ProxyPin stands out for its reliability and simplicity in scenarios where quick, ad-hoc network inspection is needed, such as during app development cycles or security assessments.