The Swidget App allows you to change the pressure units under preferences in the settings menu.  Follow the instructions below to change between kilopascals (kPa), millibars (mbar), milliliters of mercury (mmHg), or inches of mercury (inHg).

1. Tap Settings at the bottom of the screen.
2. Tap Manage Sites from the Settings screen.
3. Tap the Site you would like to manage.
     
4. Select Unit Preferences
5. Tap the unit that you want to change and select the new unit.