@kingstinct/react-native-healthkit

React Native bindings for HealthKit with full TypeScript and Promise support covering almost everything. Keeping TypeScript mappings as close as possible to HealthKit - both in regards to naming and serialization. This will make it easier to keep this library up-to-date with HealthKit as well as browsing the official documentation (and if something - metadata properties for example - is not typed it will still be accessible).

Data Types	Query	Save	Subscribe	Examples
80+ Quantity Types	✅	✅	✅	Steps, energy burnt, blood glucose etc..
13 Category Types	✅	✅	✅	Sleep analysis, mindful sessions etc..
75+ Workout Activity Types	✅	✅	✅	Swimming, running, table tennis etc..
Correlation Types	✅	✅	✅	Food and blood pressure
Document Types	✅	❌	✅	CDA documents exposed as Base64 data
Clinical Records	✅	❌	✅	Lab results etc in FHIR JSON format

Installation

npm install @kingstinct/react-native-healthkit
cd ios
pod install

or

yarn add @kingstinct/react-native-healthkit
cd ios
pod install

Remember to set NSHealthUpdateUsageDescription and NSHealthShareUsageDescription in your Info.plist as well as enable the HealthKit capability for the project in Xcode. During runtime you need to check if HealthKit is available on the device with isHealthDataAvailable and request permissions with requestAuthorization. The example has been migrated to Expo for easy-of-use and maintainability. See the example app.json for how to apply this to your project. Just keep in mind this will not work in Expo Go since there is native iOS code involved - you'll have to use EAS to build your own client.

Since this package is using Swift you might also need to add a bridging header in your project if you haven't already, you can find more about that in the official React Native docs

Usage

  import HealthKit, { HKUnit, HKQuantityTypeIdentifier, HKInsulinDeliveryReason, HKCategoryTypeIdentifier } from '@kingstinct/react-native-healthkit';

  const isAvailable = await HealthKit.isHealthDataAvailable();

  /* Read latest sample of any data */
  await HealthKit.requestAuthorization([HKQuantityTypeIdentifier.bodyFatPercentage]); // request read permission for bodyFatPercentage

  const { quantity, unit, startDate, endDate } = await HealthKit.getMostRecentQuantitySample(HKQuantityTypeIdentifier.bodyFatPercentage); // read latest sample
  
  console.log(quantity) // 17.5
  console.log(unit) // %

  /* Listen to data */
  await HealthKit.requestAuthorization([HKQuantityTypeIdentifier.heartRate]); // request read permission for heart rate

  const unsubscribe = HealthKit.subscribeToChanges(HKQuantityTypeIdentifier.heartRate, () => {
    // refetch whichever queries you need
  });

  /* write data */
  await HealthKit.requestAuthorization([], [HKQuantityTypeIdentifier.insulinDelivery]); // request write permission for insulin delivery

  ReactNativeHealthkit.saveQuantitySample(
      HKQuantityTypeIdentifier.insulinDelivery,
      HKUnit.InternationalUnit,
      5.5,
      {
        metadata: {
          // Metadata keys could be arbirtary string to store app-specific data.
          // To use built-in types from https://developer.apple.com/documentation/healthkit/samples/metadata_keys
          // you need to specify string values instead of variable names (by dropping MetadataKey from the name).
          HKInsulinDeliveryReason: HKInsulinDeliveryReason.basal,
        },
      }
    );


  /* Hooks */
  const lastBodyFatSample = HealthKit.useMostRecentQuantitySample(HKQuantityTypeIdentifier.bodyFatPercentage);
  const lastMindfulSession = Healthkit.useMostRecentCategorySample(
    HKCategoryTypeIdentifier.mindfulSession
  );
  const lastWorkout = Healthkit.useMostRecentWorkout();

A note on Apple Documentation

We're striving to do as straight a mapping as possible to the Native Libraries. This means that in most cases the Apple Documentation makes sense. However, when it comes to the Healthkit Metadata Keys the documentation doesn't actually reflect the serialized values. For example HKMetadataKeyExternalUUID in the documentation serializes to HKExternalUUID - which is what we use.

Clinical Records

For accessing Clinical Records use old version (3.x) or use specific branch ""

Contributing

See the contributing guide to learn how to contribute to the repository and the development workflow.

License

MIT