Phase is a smart planning brand that helps professionals align their workday with their changing energy and focus. Its planner connects wearable and health app data—including sleep, readiness, heart rate variability, recovery, and cycle information—with existing tasks and calendar events. By assessing whether tasks call for collaboration, quiet reflection, or sustained attention, Phase recommends what to focus on and when, helping users make more informed decisions and feel productive without expecting the same performance every day.

The service works with tools users already rely on, including Oura, Whoop, Apple Health, Garmin, and Flo, as well as more than 70 other wearables and apps. It also syncs with existing task and calendar platforms, organizing flexible work around a person’s current biological signals. Phase says its recommendations draw on peer-reviewed research into hormones, sleep, and cognition, with input from scientific advisors specializing in areas such as neuroendocrinology, sleep science, and women’s health.