What if tracking behavioral health status were as easy as counting steps? Measuring mental health can be difficult, especially knowing what is happening between interactions with care providers. HealthRhythms uses passive, continuous sensing from smart phones and machine learning to translate daily activities into timely, individualized insights into patient status that are based on 40 years of clinical research and circadian science. Supported by such insights, care teams can make more accurate assessments, know where to focus their resources, quickly determine proper levels of care, and follow the effects of treatment over time. These data and insights are a step toward providing access to brain health for everyone, always.