The 2025 US Open Tennis application, developed by the United States Tennis Association in partnership with IBM, serves as the definitive digital companion for the Grand Slam tournament running from August 18th to September 7th, 2025. This official platform positions itself as the primary source for real-time tournament information, replacing traditional printed programs and providing dynamic content updates throughout the three-week competition period. Core functionality centers around comprehensive match tracking through live scores, detailed player profiles, and interactive tournament draws. The 'At the Open' feature provides wayfinding and venue information specifically designed for on-site attendees, offering direct links to amenities and court locations. The application integrates scheduling functionality that allows users to follow specific players or matches, with push notifications for score updates and match commencement alerts. All data synchronizes in near real-time through IBM's tournament backend systems. User experience demonstrates thoughtful design for both stadium attendees and remote viewers. The interface employs a clean, navigational structure with quick-access tabs for scores, schedules, and player information. Real-world usage patterns show peak engagement during match hours, with attendees using the app for wayfinding and session planning while remote users primarily track scores and watch highlights. The application maintains functionality even during high-traffic periods when cellular networks at Flushing Meadows become congested. User feedback trends indicate overwhelmingly positive reception, with particular praise for reliability and on-site utility. Reviewer swilson44 (August 27, 2024) noted the app's effectiveness for 'quickly finding who you want to watch' both at the venue and remotely. Cricket2point0 (August 29, 2024) provided constructive feedback regarding filtering options, suggesting expanded live score filtering capabilities similar to those available for completed matches. Multiple reviews mentioned the application's superiority over other Grand Slam tournament apps. The application demonstrates notable strengths in reliability and comprehensive tournament coverage, though some users note opportunities for enhanced filtering options. Its dual-purpose design effectively serves both on-site attendees needing navigation and match planning tools and remote viewers requiring real-time score updates. The integration with IBM's scoring systems ensures accuracy, while the USTA's direct involvement guarantees official tournament data. Ideal usage scenarios include stadium navigation during attendance, personalized player tracking, and remote tournament following with minimal latency.