API overview

import {
  // Core functions
  requestAuthorization,
  isHealthDataAvailable,
  
  // Query functions
  queryQuantitySamples,
  queryCategorySamples,
  queryWorkoutSamples,
  
  // Save functions
  saveQuantitySample,
  saveCategorySample,
  saveWorkoutSample,
  
  // React Hooks
  useHealthkitAuthorization,
  useMostRecentQuantitySample,
  useSubscribeToChanges,
  
  // Types
  QuantityTypeIdentifier,
  CategoryTypeIdentifier,
  AuthorizationStatus,
} from '@kingstinct/react-native-healthkit';

const { samples } = await queryQuantitySamples(
  'HKQuantityTypeIdentifierStepCount',
  {
    from: new Date(2024, 0, 1),
    to: new Date(),
  }
);

const mostRecentSteps = useMostRecentQuantitySample(
  'HKQuantityTypeIdentifierStepCount'
);

// TypeScript knows this returns a QuantitySample with specific fields
const sample = await getMostRecentQuantitySample(
  'HKQuantityTypeIdentifierHeartRate'
);

// ✅ Valid - TypeScript allows these fields
console.log(sample.quantity, sample.unit);

// ❌ Error - TypeScript catches invalid fields
console.log(sample.invalidField);

const isAvailable = isHealthDataAvailable();

if (isAvailable) {
  // Safe to use HealthKit APIs
}