appleSleepingWristTemperature: HealthKit quantity type
HKQuantityTypeIdentifierAppleSleepingWristTemperature · read from Apple’s documentation on 2026-10-02
HKQuantityTypeIdentifier.appleSleepingWristTemperature (Objective-C HKQuantityTypeIdentifierAppleSleepingWristTemperature) is a HealthKit quantity type in Apple's "Body measurements" group. Apple's abstract: “A quantity sample type that records the wrist temperature during sleep.” Apple's discussion says its samples use temperature units and measure discrete values, so in HKStatisticsQuery it takes .discreteAverage, .discreteMin or .discreteMax. Apple states that apps cannot save it: “These samples are read-only.” It is available from iOS 16.0 and watchOS 9.0.
What Apple says appleSleepingWristTemperature is
A quantity sample type that records the wrist temperature during sleep.
Apple’s abstract, quoted from its appleSleepingWristTemperature reference page, read 2026-10-02. Apple’s discussion of the type runs 238 words.
- Swift
HKQuantityTypeIdentifier.appleSleepingWristTemperature- Objective-C
HKQuantityTypeIdentifierAppleSleepingWristTemperature- Family
HKQuantityTypeIdentifier- Apple's topic group
- Body measurements
- Group page
- Body measurements
- Apple's reference
- appleSleepingWristTemperature on developer.apple.com
Availability
The versions Apple’s documentation data gives for appleSleepingWristTemperature, platform by platform, as read on 2026-10-02.
| Platform | Introduced | Deprecated |
|---|---|---|
| iOS | 16.0 | — |
| iPadOS | 16.0 | — |
| Mac Catalyst | 16.0 | — |
| macOS | 13.0 | — |
| visionOS | 1.0 | — |
| watchOS | 9.0 | — |
The rest of that release: HealthKit Types Introduced in iOS 16.
Sum or average, and in which units
Apple states both of these in the prose of the type’s discussion, not as properties, so they are derived from Apple’s sentence and the sentence is shown with each.
Aggregation style
discrete — in an HKStatisticsQuery, use .discreteAverage, .discreteMin or .discreteMax. Apple’s sentence:
Sleeping wrist temperature samples use temperature units (described in ) and measure discrete values (described in ).
Unit family
temperature — every type in this family is on the HKUnit reference.
Apple states it in the same sentence as the aggregation style, quoted above.
Empty parentheses and a dangling “described in” mark links in Apple’s sentence to other documentation pages: the generator keeps the sentence’s text, not its links, and the quote is left as stored rather than repaired.
Can apps write appleSleepingWristTemperature?
No. Apple’s documentation states that these samples are read-only:
These samples are read-only.
On Android Health Connect
No verified Health Connect counterpart. The cross-platform matrix pairs only metrics checked against both Apple’s and Google’s documentation, and appleSleepingWristTemperature is not among them. A similarly named Health Connect record may exist, but a name match is not a verified mapping.
Questions
- Should I sum or average appleSleepingWristTemperature in HealthKit?
- Average it, or take its minimum or maximum — do not sum it. Apple's documentation for appleSleepingWristTemperature describes it as measuring discrete values, so an HKStatisticsQuery over it takes .discreteAverage, .discreteMin or .discreteMax. Apple's sentence, as read on 2026-10-02: "Sleeping wrist temperature samples use temperature units (described in ) and measure discrete values (described in )."
- Which unit family does Apple give appleSleepingWristTemperature?
- Temperature. Apple's discussion of appleSleepingWristTemperature says its samples use temperature units: "Sleeping wrist temperature samples use temperature units (described in ) and measure discrete values (described in )."
- Can my app write appleSleepingWristTemperature samples to HealthKit?
- No. Apple's documentation for appleSleepingWristTemperature states: "These samples are read-only." (read 2026-10-02).
- Which iOS version added appleSleepingWristTemperature?
- iOS 16.0. Apple's availability data for appleSleepingWristTemperature lists iOS 16.0, iPadOS 16.0, Mac Catalyst 16.0, macOS 13.0, visionOS 1.0 and watchOS 9.0.
Sources checked
- Apple — HKQuantityTypeIdentifier.appleSleepingWristTemperature · read 2026-10-02
- Apple — HKQuantityTypeIdentifier · read 2026-10-02
Apple’s abstract and sentences are quoted for identification; the page layout, the capsule and the cross-platform pairing are AIFitnessAPI’s. Generated from Apple’s documentation by scripts/fetch-healthkit-identifiers.mjs, not typed by hand — the same data as the full identifier table.