The approximate number of floors ascended by walking.
- iOS 8.0+
- macOS 10.15+
- Mac Catalyst 13.0+
- watchOS 2.0+
- Core Motion
This value reflects only the floors ascended while the user was walking or running up stairs and does not reflect the floors ascended by elevator or other assisted means. A single floor has a height of approximately three meters. The value in this property is
nil when floor counting is not supported on the current device.