appleWalkingSteadiness: HealthKit quantity type
HKQuantityTypeIdentifierAppleWalkingSteadiness · read from Apple’s documentation on 2026-10-02
HKQuantityTypeIdentifier.appleWalkingSteadiness (Objective-C HKQuantityTypeIdentifierAppleWalkingSteadiness) is a HealthKit quantity type in Apple's "Mobility" group. Apple's abstract: “A quantity sample type that measures the steadiness of the user’s gait.” Apple's discussion says its samples use percentage units and measure discrete values, so in HKStatisticsQuery it takes .discreteAverage, .discreteMin or .discreteMax. Apple states that apps cannot save it: “Walking Steadiness samples are read-only.” It is available from iOS 15.0 and watchOS 8.0.
What Apple says appleWalkingSteadiness is
A quantity sample type that measures the steadiness of the user’s gait.
Apple’s abstract, quoted from its appleWalkingSteadiness reference page, read 2026-10-02. Apple’s discussion of the type runs 178 words.
- Swift
HKQuantityTypeIdentifier.appleWalkingSteadiness- Objective-C
HKQuantityTypeIdentifierAppleWalkingSteadiness- Family
HKQuantityTypeIdentifier- Apple's topic group
- Mobility
- Group page
- Mobility
- Apple's reference
- appleWalkingSteadiness on developer.apple.com
Availability
The versions Apple’s documentation data gives for appleWalkingSteadiness, platform by platform, as read on 2026-10-02.
| Platform | Introduced | Deprecated |
|---|---|---|
| iOS | 15.0 | — |
| iPadOS | 15.0 | — |
| Mac Catalyst | 15.0 | — |
| macOS | 13.0 | — |
| visionOS | 1.0 | — |
| watchOS | 8.0 | — |
The rest of that release: HealthKit Types Introduced in iOS 15.
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:
Samples that match the Walking Steadiness identifier use percentage units (described in ) and measure discrete values (described in ).
Unit family
percentage — 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 appleWalkingSteadiness?
No. Apple’s documentation states that these samples are read-only:
Walking Steadiness 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 appleWalkingSteadiness 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 appleWalkingSteadiness in HealthKit?
- Average it, or take its minimum or maximum — do not sum it. Apple's documentation for appleWalkingSteadiness 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: "Samples that match the Walking Steadiness identifier use percentage units (described in ) and measure discrete values (described in )."
- Which unit family does Apple give appleWalkingSteadiness?
- Percentage. Apple's discussion of appleWalkingSteadiness says its samples use percentage units: "Samples that match the Walking Steadiness identifier use percentage units (described in ) and measure discrete values (described in )."
- Can my app write appleWalkingSteadiness samples to HealthKit?
- No. Apple's documentation for appleWalkingSteadiness states: "Walking Steadiness samples are read-only." (read 2026-10-02).
- Which iOS version added appleWalkingSteadiness?
- iOS 15.0. Apple's availability data for appleWalkingSteadiness lists iOS 15.0, iPadOS 15.0, Mac Catalyst 15.0, macOS 13.0, visionOS 1.0 and watchOS 8.0.
Sources checked
- Apple — HKQuantityTypeIdentifier.appleWalkingSteadiness · 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.