A
Andy Kennan
Problem Statement
Currently, metrics live in separate trend cards, making it difficult to spot relationships between related biomarkers. When Apple Watch detects an issue - such as elevated breathing disturbances - users have no native way to plot those events against companion metrics (respiratory rate, blood oxygen/SpO_2) or see how specific habits and sleep conditions affect them.
Proposed Feature: Custom Chart Builder
Give users the ability to build custom, saved charts that combine multiple metrics on a shared timeline and overlay Journal/lifestyle tags.
  1. Metric Selection & Dual Y-Axes
Allow users to select 2–3 metrics to plot on a single graph.
Automatically handle mixed units using split or dual Y-axes (e.g., SpO_2 percentage on the left axis, Breaths/Min and Disturbance counts on the right axis).
Support Apple Health nocturnal respiratory data (Breathing Disturbances, Respiratory Rate, Oxygen Saturation).
  1. Journal & Contextual Tag Overlays
Option to display logged Journal tags as vertical markers or color-coded flags along the timeline.
Key use-case tags: Sleeping position (side vs. back), Humidifier used, Mouth tape, Elevated head, Alcohol, Late meal.
  1. Correlation / Impact Insights
Visual toggle to compare "Tagged Nights" vs. "Untagged Nights" to see whether an intervention consistently stabilizes the target metric.