Healthkit
Read, write, and query Apple Health data using HealthKit.
Install
npx skills add dpearson2699/swift-ios-skills --skill healthkit -g -a claude-code -y- Repository
- dpearson2699/swift-ios-skills1.3k
- Category
- Writing
- Updated
- 3mo ago
- License
- See repository
- Context cost
- Mediumabout 3,000 tokens
- Runs scripts
- No, instructions only
What it does
Read, write, and query Apple Health data using HealthKit. Covers HKHealthStore authorization, sample queries, statistics queries, statistics collection queries for charts, saving HKQuantitySample data, background delivery, workout sessions with HKWorkoutSession and HKLiveWorkoutBuilder, HKUnit, and HKQuantityTypeIdentifier values. Use when integrating with Apple Health, displaying health metrics, recording workouts, or enabling background health data delivery.
HealthKit
Read and write health and fitness data from the Apple Health store. Covers authorization, queries, writing samples, background delivery, and workout sessions. Targets Swift 6.3 / iOS 26+.
Contents
- Setup and Availability
- Authorization
- Reading Data: Sample Queries
- Reading Data: Statistics Queries
- Reading Data: Statistics Collection Queries
- Writing Data
- Background Delivery
- Workout Sessions
- Common Data Types
- HKUnit Reference
- Common Mistakes
- Review Checklist
- References
Setup and Availability
Project Configuration
- Enable the HealthKit capability in Xcode (adds the entitlement)
- Add
NSHealthShareUsageDescription(read) andNSHealthUpdateUsageDescription(write) to Info.plist - For background delivery, enable the "Background Delivery" sub-capability
Availability Check
Always check availability before calling other HealthKit APIs. Health data is available on iOS, watchOS, visionOS, iPadOS 17+, and iOS apps running on Vision Pro. It is unavailable on iPadOS 16 or earlier and may be restricted by managed device policy.
import HealthKit
guard HKHealthStore.isHealthDataAvailable() else {
// Health data is unavailable or restricted on this device.
return
}
let healthStore = HKHealthStore()
Create a single HKHealthStore instance and reuse it throughout your app. It
is thread-safe. If HealthKit is optional, review Xcode's generated
UIRequiredDeviceCapabilities healthkit entry so unsupported devices are not
excluded unintentionally.
Authorization
Request only the types your app genuinely needs. App Review rejects apps that over-request.
