Robust circadian rhythms are foundational to health, but modern life chronically disrupts our bodies’ clocks. Arcascope is a circadian health management platform helping people reclaim control of their internal time. Using signals from phones and wearable devices, we track digital biomarkers of circadian rhythms in the real world and use these biomarkers to help control for circadian effects in trials, make personalized recommendations to help shift workers sleep more, and help cancer patients reduce their experiences of fatigue. We’ve validated our apps and software solutions in multiple randomized controlled trials and have built on decades of research from the University of Michigan and Harvard, with a long term goal of making “chronomedicine”—or the incorporation of circadiance science into all aspects of health and wellbeing—a reality. https://www.arcascope.com