Wrist Turn Wake is a feature which allows the tracker screen to turn on via wrist rotation. It can be useful to turn on the screen, but can also cause undue battery drain - to toggle on/off, turn on the Apex HR and press the button on the side to scroll to and select settings > swipe up on the screen to reach the Wrist Turn Wake screen (displayed as wrist-turn-on.png when on, and wrist-turn-off.png when off), and tap the toggle button: 

  • toggle-on.png (on) 
  • toggle-off.png (off)