The CARFAX - New & Used Cars application serves as a mobile marketplace connecting prospective buyers with dealership inventory while integrating the company's signature vehicle history reporting system. Positioned as a trusted intermediary in the automotive marketplace, the app leverages CARFAX's established reputation for vehicle data transparency to facilitate more informed used car purchases. The application's core functionality centers around its integrated vehicle history reports, which are automatically included with every used car listing. This feature provides critical data points including accident history, service records, ownership changes, and title status. Additional functionality includes price drop alerts for saved vehicles, comprehensive filtering options by make, model, price range and location, and side-by-side comparison tools that allow users to evaluate multiple vehicles simultaneously. The valuation calculator incorporates vehicle history data to provide adjusted market values rather than relying solely on standard market pricing. User experience demonstrates generally intuitive navigation with a clean interface organized around search and discovery functions. The map-based inventory browsing provides geographical context for available vehicles, while detailed listing pages consolidate photographs, specifications, and historical data in a scrollable format. Real-world usage patterns indicate the app serves both active shoppers conducting systematic searches and casual users monitoring market trends, with particular utility during the final stages of vehicle selection and negotiation. User feedback trends highlight generally positive experiences with specific functional limitations. Multiple reviewers, including David Davenport in May 2025, noted persistent issues with filter functionality requiring frequent resets, while others praised the maintenance tracking features and regular data updates. Nathan Reidle's July 2025 review specifically appreciated the email notifications for vehicle maintenance and registration timelines, indicating value beyond mere purchasing functionality. The consistent 4-star ratings suggest reliable core functionality with occasional technical imperfections. The application's primary strength lies in its integration of comprehensive vehicle history data with marketplace functionality, creating a unique value proposition in automotive shopping. Limitations include occasional technical issues with location-based filtering and search parameters as noted in user feedback. The platform proves most valuable for serious used car shoppers prioritizing vehicle history transparency and those comparing multiple options across different dealerships within a geographic region.