TfL Go represents Transport for London's flagship mobile application, serving as the definitive digital companion for navigating the British capital's extensive transportation network. The app establishes itself as the authoritative source for real-time transit information, leveraging TfL's official data feeds to provide accurate journey planning across Tube, Overground, Elizabeth line, DLR, Tram, National Rail, and the IFS Cloud Cable Car systems. The application's core functionality centers around its intelligent route planning engine, which processes multiple transportation variables to suggest optimal journeys. Key features include real-time service status updates, step-free accessibility filtering, live departure boards, and disruption alerts. The app integrates contactless payment capabilities through TfL's fare system, though it primarily functions as a planning tool rather than a direct payment platform. The mapping interface dynamically adjusts to show only accessible stations when toggling step-free mode, demonstrating thoughtful inclusive design considerations. User experience reflects a deliberately minimalist interface that prioritizes clarity over visual complexity. The iconic Tube map forms the visual foundation, with intuitive gesture controls for zooming and panning across London's transport geography. Real-world usage patterns show particularly strong adoption among tourists navigating the city for the first time, as evidenced by Ahmed from US (October 2023) noting 'Excellent help and directions for novice user like me.' The app performs reliably across various network conditions, with offline capability for pre-loaded journey information. User feedback trends consistently highlight the app's reliability and interface clarity. Globetrotter862 (May 2024) characterizes it as 'THE Transport App for London,' while WeezSteez (April 2024) praises the 'simple, clean, functional' design. Multiple reviews from 2023-2025 consistently award five-star ratings, with SocialGuy7 (April 2025) noting 'the guidance is precise and timely, always.' The absence of critical reviews in the sampled feedback suggests high user satisfaction, though this may reflect selection bias in the available data. The application demonstrates particular strength in accessibility features and real-time accuracy, though limitations include occasional refresh delays during severe service disruptions and dependency on TfL's backend systems. Ideal use cases include tourist navigation, daily commuter planning, and accessibility-conscious journey mapping. The app serves most effectively as a complementary tool rather than replacement for physical Oyster cards or contactless payment methods, functioning primarily as an information portal rather than comprehensive payment solution.