The approximate number of floors descended by walking.
- iOS 8.0+
- macOS 10.15+
- Mac Catalyst 13.0+
- watchOS 2.0+
- Core Motion
This value reflects only the floors descended while the user was walking or running down stairs and does not reflect the floors descended 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.