Death Clock AI represents a novel approach to health management by combining mortality prediction with actionable wellness guidance. Developed by Most Days for Android platforms, the application leverages artificial intelligence and scientific research to estimate life expectancy based on user-provided health data and lifestyle factors. The app has gained significant media attention, being featured in major publications and recognized by the Wall Street Journal as technology poised to impact lives in 2025. The core functionality centers on a sophisticated algorithm that processes user inputs including age, medical history, exercise frequency, sleep patterns, substance use, and dietary habits. The system generates two primary predictions: current life expectancy based on existing habits, and potential longevity if specific behavioral modifications are implemented. This comparative approach provides users with tangible motivation for lifestyle changes. The AI health concierge feature offers personalized recommendations ranging from hydration targets to exercise regimens, creating a proactive health management system rather than merely presenting statistical outcomes. User experience is characterized by a straightforward interface that guides users through data input with clear, structured questionnaires. The design emphasizes accessibility while maintaining a professional tone despite the sensitive subject matter. Real-world usage patterns indicate most users engage with the app periodically rather than daily, typically returning after implementing suggested changes to track progress or update their longevity projections. The interface successfully balances the gravity of mortality discussions with practical, actionable health guidance. User feedback trends show strong appreciation for the scientific approach and motivational aspects. Multiple reviewers specifically mention the value of comparative longevity projections. Chad Sorenson (February 13, 2025) noted appreciation for 'the Science backed, powered by AI aspect, as well as the age of death with your current habits vs fixing a few things.' Kristina Godau (May 17, 2025) found the information 'certainly motivating,' particularly the demonstration of how habit changes could extend lifespan. Some users, including Petra Miracle (June 12, 2025), approach the predictions with skepticism regarding absolute accuracy while still valuing the health recommendations. The application demonstrates notable strengths in its data-driven approach and ability to motivate behavioral change through personalized projections. However, limitations include the inherent uncertainty of longevity predictions and potential psychological impacts of mortality-focused content. The app functions most effectively as a motivational tool for health improvement rather than a precise medical predictor. Ideal use cases involve adults seeking tangible incentives for lifestyle modifications, with the understanding that projections represent statistical probabilities rather than certain outcomes.