XCUITest remains the industry standard for UI automation on the Apple ecosystem. While "streams" is not a native term in the XCUITest API, the framework's ability to stream UI events, synchronize asynchronous actions, and integrate with video streaming for test reporting makes it the most robust option for iOS developers. However, it suffers from flakiness when dealing with network latency and requires a steep learning curve for parallel execution "streaming."
To use XCUI Streams, users typically install it from a GitHub repository or a zip file. xcui streams