Shiny.Health

Shiny Health

Apple HealthKit and Android Health Connect for your .NET MAUI apps.

Features

• Read summary values between timestamps at specified intervals
• Write health data to Apple HealthKit and Android Health Connect
• Real-time observation of health data changes via IAsyncEnumerable<HealthResult>
• Query distance, step count, calories, and heart rate
• Query weight, height, body fat percentage, and resting heart rate
• Query blood pressure (systolic/diastolic), oxygen saturation, sleep duration, and hydration
• Permission management for both platforms with read/write support

How To Use

IHealthService health; // inject via DI

// request read permissions
var result = await health.RequestPermissions(
    DataType.Calories,
    DataType.Distance,
    DataType.StepCount,
    DataType.HeartRate
);

// request per-metric read/write permissions in a single call
var result2 = await health.RequestPermissions(
    (PermissionType.Read, DataType.StepCount),
    (PermissionType.Read, DataType.HeartRate),
    (PermissionType.Write, DataType.Weight),
    (PermissionType.ReadWrite, DataType.BloodPressure)
);

var end = DateTimeOffset.Now;
var start = DateTimeOffset.Now.AddDays(-1);

// query data
var distance = (await health.GetDistances(start, end, Interval.Days)).Sum(x => x.Value);
var calories = (await health.GetCalories(start, end, Interval.Days)).Sum(x => x.Value);
var steps = (await health.GetStepCounts(start, end, Interval.Days)).Sum(x => x.Value);
var heartRate = (await health.GetAverageHeartRate(start, end, Interval.Days)).Average(x => x.Value);

// body metrics
var weight = (await health.GetWeight(start, end, Interval.Days)).Average(x => x.Value); // kg
var height = (await health.GetHeight(start, end, Interval.Days)).Average(x => x.Value); // meters
var bodyFat = (await health.GetBodyFatPercentage(start, end, Interval.Days)).Average(x => x.Value); // %
var restingHr = (await health.GetRestingHeartRate(start, end, Interval.Days)).Average(x => x.Value); // bpm

// vitals
var o2 = (await health.GetOxygenSaturation(start, end, Interval.Days)).Average(x => x.Value); // %
var bp = await health.GetBloodPressure(start, end, Interval.Days); // BloodPressureResult with Systolic/Diastolic (mmHg)

// lifestyle
var sleep = (await health.GetSleepDuration(start, end, Interval.Days)).Sum(x => x.Value); // hours
var water = (await health.GetHydration(start, end, Interval.Days)).Sum(x => x.Value); // liters

// --- Writing Data ---

// request write permissions (uniform)
await health.RequestPermissions(PermissionType.Write, DataType.Weight, DataType.StepCount, DataType.Hydration);

// or mix read/write per metric
await health.RequestPermissions(
    (PermissionType.Write, DataType.Weight),
    (PermissionType.ReadWrite, DataType.Hydration)
);

// write a weight measurement
await health.Write(new NumericHealthResult(DataType.Weight, DateTimeOffset.Now, DateTimeOffset.Now, 75.0)); // kg

// write step counts over a time range
await health.Write(new NumericHealthResult(DataType.StepCount, start, end, 500));

// write hydration
await health.Write(new NumericHealthResult(DataType.Hydration, start, end, 0.5)); // liters

// write blood pressure
await health.Write(new BloodPressureResult(DateTimeOffset.Now, DateTimeOffset.Now, 120.0, 80.0)); // mmHg

// --- Observing Real-Time Changes ---

// observe heart rate changes as they arrive
using var cts = new CancellationTokenSource();

await foreach (var result in health.Observe(DataType.HeartRate, cancelToken: cts.Token))
{
    if (result is NumericHealthResult numeric)
        Console.WriteLine($"Heart rate: {numeric.Value} bpm at {numeric.Start:T}");
}

// observe with custom polling interval (Android only, iOS ignores this - it's push-based)
await foreach (var result in health.Observe(DataType.StepCount, pollingInterval: TimeSpan.FromSeconds(10), cancelToken: cts.Token))
{
    if (result is NumericHealthResult numeric)
        Console.WriteLine($"Steps: {numeric.Value}");
}

Supported Metrics

Setup

Install from NuGet:

dotnet add package Shiny.Health

In your MauiProgram.cs:

public static MauiApp CreateMauiApp()
{
    var builder = MauiApp
        .CreateBuilder()
        .UseMauiApp<App>()
        .UseShiny();

    builder.Services.AddHealthIntegration();
    return builder.Build();
}

iOS Setup

Your app requires a provisioning profile with HealthKit capabilities enabled.

Info.plist

<key>UIRequiredDeviceCapabilities</key>
<array>
    <string>healthkit</string>
</array>
<key>NSHealthUpdateUsageDescription</key>
<string>We need access to update your health data</string>
<key>NSHealthShareUsageDescription</key>
<string>We need access to read your health data</string>

Entitlements.plist

<key>com.apple.developer.healthkit</key>
<true />
<key>com.apple.developer.healthkit.background-delivery</key>
<true />

Android Setup (Health Connect)

Android uses Health Connect (the replacement for the deprecated Google Fit API). Health Connect requires Android 9 (API 28) or higher.

AndroidManifest.xml

<!-- Required: declare which health data your app reads/writes -->
<uses-permission android:name="android.permission.health.READ_STEPS" />
<uses-permission android:name="android.permission.health.READ_HEART_RATE" />
<uses-permission android:name="android.permission.health.READ_TOTAL_ENERGY_BURNED" />
<uses-permission android:name="android.permission.health.READ_DISTANCE" />
<uses-permission android:name="android.permission.health.READ_WEIGHT" />
<uses-permission android:name="android.permission.health.READ_HEIGHT" />
<uses-permission android:name="android.permission.health.READ_BODY_FAT" />
<uses-permission android:name="android.permission.health.READ_RESTING_HEART_RATE" />
<uses-permission android:name="android.permission.health.READ_BLOOD_PRESSURE" />
<uses-permission android:name="android.permission.health.READ_OXYGEN_SATURATION" />
<uses-permission android:name="android.permission.health.READ_SLEEP" />
<uses-permission android:name="android.permission.health.READ_HYDRATION" />
<uses-permission android:name="android.permission.ACTIVITY_RECOGNITION" />

<!-- Optional: declare which health data your app writes -->
<uses-permission android:name="android.permission.health.WRITE_STEPS" />
<uses-permission android:name="android.permission.health.WRITE_HEART_RATE" />
<uses-permission android:name="android.permission.health.WRITE_TOTAL_ENERGY_BURNED" />
<uses-permission android:name="android.permission.health.WRITE_DISTANCE" />
<uses-permission android:name="android.permission.health.WRITE_WEIGHT" />
<uses-permission android:name="android.permission.health.WRITE_HEIGHT" />
<uses-permission android:name="android.permission.health.WRITE_BODY_FAT" />
<uses-permission android:name="android.permission.health.WRITE_RESTING_HEART_RATE" />
<uses-permission android:name="android.permission.health.WRITE_BLOOD_PRESSURE" />
<uses-permission android:name="android.permission.health.WRITE_OXYGEN_SATURATION" />
<uses-permission android:name="android.permission.health.WRITE_SLEEP" />
<uses-permission android:name="android.permission.health.WRITE_HYDRATION" />

<!-- Required: allow your app to discover Health Connect -->
<queries>
    <package android:name="com.google.android.apps.healthdata" />
</queries>

Requirements

• The Health Connect app must be installed on the device
• Minimum SDK version must be set to 28 (Android 9)