Air pressure
Tap 
in the watch app list to open Air pressure and display the current barometric altitude.
The limits of the altitude range are between -200-9000 meters, and the pressure range is 700-1100 hPa.
Tap in the watch app list to open Air pressure and display the current barometric altitude.
The limits of the altitude range are between -200-9000 meters, and the pressure range is 700-1100 hPa.