Cortex is Metric’s conversational layer for questions about data available to the app. Depending on permissions and coverage, that context can include Metric logs and supported Apple Health signals such as activity, sleep, workouts, heart-rate trends, or body measurements.
Useful jobs for Cortex
- Summarize recent trends in data the app can access.
- Compare two time periods while noting gaps in coverage.
- Help turn a broad goal into a practical wellness question.
- Draft a nutrition or training idea for the user to review and edit.
AI answers require judgment
Tool access can ground an answer in available data, but it does not make the answer automatically complete or correct. Missing measurements, device error, ambiguous prompts, and model error can all affect the response.
Questions it should not settle
Cortex should not be used to diagnose symptoms, change medication, clear an injury, or replace individualized care. For a consequential decision, inspect the underlying records and bring the relevant information to a qualified professional.
Wellness and editorial boundary
Metric is a wellness product. Its scores, AI responses, nutrition analyses, and wearable-derived values are informational estimates, not diagnoses or medical advice. Results depend on the data available and may be incomplete or inaccurate. Review source data and speak with a qualified professional about health concerns.
- Metric Editorial TeamAuthor profile and review responsibilities
- Editorial policyHow Metric separates product education, evidence, and marketing
- Methodology and limitationsHow Metric describes calculations, coverage, and uncertainty
- Metric AI health coachCurrent Cortex product overview
- Metric health-data privacyPermissions and privacy boundaries
- Apple Health permissions and data sourcesApple’s explanation of Health access, sources, and permissions
- Apple HealthKit documentationPrimary developer documentation