Rejuve.ai is a decentralized longevity platform combining artificial intelligence, personal health data, and blockchain incentives to advance human healthspan research. Its mission is to democratize longevity science by letting individuals contribute health data, receive personalized insights, and build collective knowledge about aging. Through the Longevity App, users can track biomarkers, sync wearables, complete health surveys, estimate biological age, and receive lifestyle guidance. Anonymized data feeds into the International Longevity Research Database (IRLDB), supporting AI models and collaborative research. Participants earn RJV tokens for contributing data, redeemable for discounts on health tests, supplements, and longevity services. The platform uses advanced AI, including neural and Bayesian models connected to the SingularityNET / Hyperon ecosystem, to provide personalized longevity intelligence and N-of-1 insights. It targets health enthusiasts, biohackers, longevity researchers, and those interested in decentralized science (DeSci). Highlights include the Longevity App, a rewards mechanism paying RJV tokens, the IRLDB, SingularityNET AI integration, and participatory science. Potential considerations include evolving AI models, fluctuating token dynamics, and the need for consistent user engagement. The overall verdict is 4.5/5 stars, calling Rejuve.ai an ambitious approach combining personal health optimization with decentralized research.