Death Clock AI positions itself as a pioneering longevity application that combines mortality prediction with proactive health management. Developed by Most Days for iOS, the app leverages artificial intelligence and scientific research to estimate users' life expectancy while offering personalized recommendations for extending it. The application has gained significant media attention, featuring in major publications and being recognized by the Wall Street Journal as influential future technology. The core functionality revolves around an extensive questionnaire assessing multiple health and lifestyle factors including diet, exercise habits, medical history, and environmental influences. The AI algorithm processes this data to generate two key projections: a baseline mortality estimate based on current habits and an optimized longevity forecast assuming improved behaviors. This dual-perspective approach provides users with tangible motivation by quantifying the potential impact of lifestyle changes. The app serves as a health concierge, offering specific recommendations ranging from sleep optimization to stress management techniques. User experience centers on an intuitive interface that presents complex health data through visually accessible dashboards and comparative analytics. The design emphasizes educational content, breaking down longevity factors into understandable metrics that show users exactly how specific behaviors affect their projected lifespan. Real-world usage patterns indicate that users typically engage with the app during health assessment phases or when seeking motivation for lifestyle changes, with many returning periodically to track progress against their longevity goals. User feedback trends consistently highlight the app's educational value and motivational impact. Reviewer Finny 1949 (June 16, 2025) noted appreciation for 'looking at all the longevity factors' describing the experience as 'educational and very interesting.' Multiple users including Ramses LCXIV (June 10, 2025) praised the freemium model that provides substantial functionality without mandatory subscriptions, contrasting with other health apps that require payments for basic insights. The motivational aspect resonates particularly with older demographics, as evidenced by KCBRIER2054 (June 9, 2025) who used it with siblings 'as a way to motivate ourselves to follow better habits.' The application demonstrates notable strengths in its data-driven approach and accessible presentation of complex health concepts, though limitations exist regarding the precision of mortality predictions and dependency on user-reported data accuracy. While the AI projections provide valuable perspective, they should be interpreted as illustrative rather than definitive medical forecasts. Ideal use cases include health-conscious individuals seeking motivation for lifestyle improvements, users interested in understanding longevity science, and those looking for accessible health assessment tools without subscription barriers.