watchOS

Controls

Swipes

• swipe down: notifications
• swipe up: controls
• swipe left / right: switch between the added watch faces

Side button

• single click: show the recent or favorite app
• double click: reveal the cards saved in Apple Wallet.
• hold: power button, Medical ID, and Emergency SOS.

Digital crown

• scroll through lists and zoom in/out on certain elements
• single click:
  • if you are on the main screen: show you the installed apps.
  • if you are inside an app: back to the main screen
• double click: go to the most recently used app

ECG

An electrocardiogram (also called an ECG or EKG) is a test that records the timing and strength of the electrical signals that make the heart beat.