Glucose prediction

Use client.glucose to predict a user's glucose curve after a meal. These examples use the client from Authentication; each prediction uses the client's timezone.

Glucose predictions and profile inputs are health data. Keep request and response values out of analytics, crash reports, and general-purpose logs.

Predict

let request = PredictGlucoseRequest(
    userProfile: GlucosePredictionProfile(
        age: 35,
        sex: .male,
        height: Height(value: 70, unit: .inches),
        weight: Weight(value: 175, unit: .pounds),
        activityLevel: .moderatelyActive,
        healthConditions: []
    ),
    foods: [selectedFood],
    startTime: Date()
)

let prediction = try await client.glucose.predict(request)

foods takes the FoodSelection from a portion or an analyzed meal. You can also pass recent cgmData (CgmReading) and consumedFoods (ConsumedHistoricalFood).

Read the result

• prediction: one GlucosePredictionPoint every 15 minutes from startTime, with minutes after startTime and the predicted glucose value in mg/dL.

• impact: a GlucoseImpact?, such as .lowImpact, .mediumImpact, or .highImpact. It can be nil, or a value added in a later release, so don't assume those three are the only ones.

• chart.min and chart.max: suggested y-axis bounds in mg/dL, not the lowest or highest point of the curve. They mark a fixed target range; chart.max is 180 when healthConditions includes .type2Diabetes, and 140 otherwise.

for point in prediction.prediction {
    print(point.minutes, point.value) // minutes after startTime, mg/dL
}
if prediction.impact == .highImpact {
    showHighImpactNote()
}

curve, scoring, minimum, and maximum are older aliases for prediction, impact, chart.min, and chart.max.

Height and weight

Height takes inches or centimeters, and Weight takes pounds or kilograms. For imperial height, show separate feet and inches fields and send the total in inches (feet * 12 + inches), not a single inches field. Let users switch between feet and inches and centimeters, and between pounds and kilograms.

Predictions are informational. Don't present them as a diagnosis or as treatment guidance.

Next: Voice capture.