Health trends and growth

Health trends turns the numbers in your record — vitals and test results — into charts you can follow over time. It's a read-only view over data other parts of the app capture; nothing here changes your record except logging a reading, which you do yourself.

Picking measurements

Open Health trends and use the Measurements selector to choose what to chart. You can chart up to five at once. Each entry shows its unit and how many readings it has; something with only one reading still appears — its value is listed under the chart until a second reading gives it a line.

The counter next to the selector (for example 2/5) is how many you've picked out of the maximum. Your last selection is remembered on that device.

Same unit vs. mixed units

• When every measurement you picked shares a unit, the lines are drawn together on one axis.
• When units differ (kg, mmHg, mg/dL…), each gets its own small chart, stacked — a shared axis across different units would only mislead.

The normal band

When you chart exactly one vital, a faint shaded band shows the normal range for your age and sex. A reading outside the range is marked in red. Weight, height, and BMI don't get a flat band — for a child those are handled by growth percentiles instead (below).

Logging a reading

Tap Log a reading, pick a measurement, type the value (the unit is filled in for you), choose when it was taken, and save. Blood pressure is one option with two fields — it records systolic and diastolic together.

Readings you enter yourself can be edited or deleted from the list under the chart. A value that came from a lab result or was recorded by a doctor is part of your clinical record and is read-only here.

BMI

BMI is calculated from your height and weight, not stored. It appears as its own series once you have both a height and a weight on file, and updates automatically whenever either changes.

Growth (for children)

If the record belongs to a child (a date of birth on file, under 19), a Growth charts button appears. It shows weight, height, head circumference (under about age 3), and BMI, each plotted against age with the WHO and CDC reference curves — the 3rd, 15th, 50th, 85th, and 97th percentiles — drawn behind the child's own readings. A point outside the 3rd to 97th percentile band is marked in red.

Head circumference uses the WHO standard through age 5; the other charts use WHO under 2 years and CDC from 2 to 19, which is the usual clinical convention.