The PCGS CoinFacts mobile application represents a significant advancement in numismatic technology, providing collectors with comprehensive access to the world's largest database of U.S. coin information. This free iOS application consolidates decades of professional coin grading service data into a mobile platform, effectively digitizing what was previously available only through printed references and desktop databases. The app's market position is particularly notable given PCGS's established reputation as one of the industry's most trusted grading services, lending immediate credibility to the information provided. The application's core functionality centers around its extensive database of over 40,000 U.S. coins, featuring detailed narratives, high-resolution images, and comprehensive valuation data. The barcode scanning capability for PCGS and NGC-graded coins enables instant authentication and information retrieval, significantly streamlining the verification process. Additional features include auction price records, population reports showing how many specimens exist in various grades, and mintage figures that provide crucial context for rarity assessment. The database is regularly updated with new auction results and market data, ensuring collectors have access to current market valuations. User experience demonstrates thoughtful design with an intuitive interface that prioritizes quick information retrieval. The search functionality allows filtering by denomination, year, mint mark, and grade, while the scanning feature provides near-instant results for certified coins. Real-world usage patterns show collectors frequently using the app during coin shows, auctions, and private transactions to verify authenticity and establish fair market values. The offline functionality ensures access to core database information even without internet connectivity, particularly valuable for collectors examining coins in locations with poor network coverage. User feedback trends consistently highlight the app's reliability and comprehensive nature. Multiple reviewers, including Brad Esprit (August 4, 2025) and oldsport stan (July 22, 2025), emphasize how the application eliminates the need for carrying physical reference materials while providing instant access to critical numismatic data. Method up (June 7, 2025) specifically noted discovering valuable Morgan dollars through the app's identification capabilities, resulting in substantial financial returns. The consistently high 4.77-star rating reflects widespread satisfaction with the application's accuracy and utility. The application's primary strength lies in its authoritative data source and comprehensive coverage, though limitations include its exclusive focus on U.S. coins and dependence on third-party grading services for barcode functionality. The app serves as an ideal tool for serious collectors, dealers, and investors requiring reliable, instant access to professional-grade numismatic information during transactions and collection management activities.