The Listening Wrist
By default, the Apple Watch is constantly listening to your environment, waiting for you to say the trigger phrase, “Hey Siri.” While it is incredibly convenient to simply speak to your wrist to set a 5-minute pasta timer without touching the screen, this convenience comes at a cost. The watch must keep its microphone active and its processor engaged enough to analyze every conversation you have, waiting for those two specific words. This constant audio processing slightly degrades the overall battery life of the device. Furthermore, if you own an iPhone and a HomePod, saying the trigger phrase often causes all three devices to accidentally wake up at once. To prevent this, you can disable the voice activation on the watch.
How to Turn Off “Hey Siri”
You can revoke the microphone’s permission to passively listen via the Siri settings.
- Open the Settings app directly on your Apple Watch (the grey gear icon).
- Scroll down the main list and tap on Siri.
- At the very top of the screen, look for the toggle switch labeled Listen for “Hey Siri”.
- Tap the switch to turn it Off (the green background will disappear).
Alternative Triggers
Disabling this switch does not break the digital assistant; it simply changes how you summon her. If you still want to set a timer using your voice, you have two options. You can either press and hold the Digital Crown for two seconds, or you can enable the “Raise to Speak” feature in that exact same menu, which allows you to simply lift your wrist directly to your mouth and start talking, completely bypassing the need for a trigger phrase while still preventing the microphone from listening when your arm is down.