A different estimate
Functional Age is distinct from the Health Age shown in Today. It uses supported health indicators to express a range, rather than presenting a single result as a definitive description of your body.
Your birth date and calendar age are excluded from this inference. Calendar age appears only as a comparison, helping you place the range in context without becoming an input to the estimate.
The evidence remains visible
The view brings together supported readings across body systems and shows where the information comes from. Sources, contributing indicators, and coverage help explain the foundation beneath the displayed range.
Missing or insufficient evidence matters too. The limits of the available inputs remain part of the experience; the range is a wellness interpretation, not a biological-age measurement or a clinical assessment.
Time without losing context
Journey keeps Health Age and Functional Age in separate views. This gives each estimate its own history, instead of blending two different ideas into a single line that suggests more certainty than the data supports.
The Functional Age view retains its bounds and preserves gaps when evidence is insufficient. Following a change over time can be useful, provided the information behind that change remains part of the picture.