HealthKit

Read and write health and fitness data, with people in full control of what they share.

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Introduced

2014

iOS 8

Kind

Framework

Runs on

Get it from

iOS

8.0+

iPadOS

8.0+

Mac Catalyst

17.0+

macOS

14.0+

tvOS

visionOS

1.0+

watchOS

2.0+

Overview

HealthKit is the central store for health data on Apple devices: activity, workouts, sleep, heart rate, nutrition, medications, mental wellbeing and much more. Apps ask for permission per data type, and people can change their minds at any time in Settings.

Recent releases added workouts on iPhone and iPad, a Medications API and workout zones.

Privacy first

People choose exactly which data each app can read or write.

Workouts

Track workouts on Apple Watch, iPhone and iPad.

Medications

Read medication schedules and logged doses.

Mental wellbeing

State of mind, plus depression and anxiety assessments.

Steps.swift

import HealthKit

let store = HKHealthStore()
let steps = HKQuantityType(.stepCount)

try await store.requestAuthorization(toShare: [], read: [steps])

let today = HKQuery.predicateForSamples(
    withStart: Calendar.current.startOfDay(for: .now), end: .now
)
let query = HKStatisticsQueryDescriptor(
    predicate: .quantitySample(type: steps, predicate: today),
    options: .cumulativeSum
)
let total = try await query.result(for: store)?
    .sumQuantity()?.doubleValue(for: .count())

History