CarGurus: Used & New Cars positions itself as a comprehensive automotive marketplace that leverages data analytics to bring transparency to vehicle transactions. The Android application aggregates listings from dealers and private sellers while applying proprietary algorithms to evaluate deals based on price history, vehicle condition, location, and market trends. This approach distinguishes it from competitors by providing quantified 'Great,' 'Fair,' or 'Overpriced' ratings rather than relying solely on user intuition or basic filtering. The application's core functionality centers around its deal rating system, which analyzes thousands of data points to provide objective assessments of listed vehicles. Users can filter searches by price range, make, model, year, mileage, and dealer distance, with additional tools for calculating financing options and trade-in values. The notification system alerts users to new listings matching their criteria, particularly highlighting vehicles meeting the 'Good Deal' threshold based on market data analysis. These features create a structured approach to vehicle acquisition that reduces information asymmetry between buyers and sellers. User experience reflects thoughtful design with intuitive navigation between search, saved vehicles, and financing calculator sections. The interface presents complex pricing data through color-coded ratings and clear visual hierarchies, making market insights accessible to non-expert users. Real-world usage patterns show most users engage in repeated searches over weeks or months, utilizing saved searches and notifications to track market fluctuations before making purchase decisions. The app effectively supports both quick browsing and detailed comparative analysis workflows. User feedback trends indicate strong satisfaction with the data-driven approach, though some note geographical limitations. Multiple five-star reviews from August 2025 praise the deal rating system and notification functionality, with Donovan Lee noting it 'tells you about good deals and gives you notifications on vehicles worth looking into.' Cole's four-star review from August 24, 2025 suggests improving distance filters, noting '500km is not enough, Nation Wide is too much,' indicating some users desire more granular geographical control. The consistent theme across reviews acknowledges the app's superiority in market transparency compared to alternatives. The application's primary strength lies in its data-driven valuation system that objectively assesses deals, though geographical search limitations represent an area for improvement. It excels for users seeking transparent pricing in local markets but may prove less optimal for those searching extremely broad or narrow geographical ranges. The financing calculator and trade-in tools provide additional utility, making it particularly valuable for users requiring comprehensive financial planning alongside vehicle selection.