Siri uses your voice to activate and answer queries. As such, it doesn't require a keyboard or a ton of screen space. And because it's contextually aware, it can handle complex questions and commands. That makes it ideal for something like the Apple Watch , where it can often work faster and more conveniently than any other input method.

In addition to its other fancy features, the new Series 4 Apple Watch features a more chatty version of Siri .

Tap the Press Home for Siri switch on iPhone 8 and older or Press Side Button for Siri switch on iPhone X and newer to enable Siri for iPhone and Apple Watch.

Siri on Apple Watch is intrinsically tied to your iPhone: If you've ever turned Siri on for your iPhone, it'll automatically be activated on your Apple Watch. If you need to enable Siri, however, here's how to do it.

There are two ways to use Siri: via the automatic "Hey Siri" command, or manually by pressing and holding on the Digital Crown.

If you have a Series 34GPS-only watch or earlier, all Siri queries are processed via your iPhone, or a remembered Wi-Fi network: If you don't have a strong connection with either your iPhone or the Wi-Fi network, your Apple Watch will be unable to process your command.

Series 3 and 4 GPS + Cellular models can use connections from your iPhone or Wi-Fi, but they can also directly connect to LTE to process Siri questions, making them a bit speedier in delivering you results.

Depending on your connection, Siri may take a few moments to process properly; after speaking, Siri may prompt you with a quick "Hang on..." or "I'll tap you when I'm ready" before responding. During this time, you can let your arm drop back to its normal position — your watch will tap you on the wrist when Siri has finished processing.

How to use "Hey Siri" on your Apple Watch

Raise your Apple Watch to your face (or, if you have wrist raise disabled, tap on the screen to wake your watch). Say Hey Siri followed by your query.

How to manually activate Siri on your Apple Watch

Press and hold the Digital Crown. State your question or command to Siri.

How to change Siri's voice on Apple Watch

On the Series 2 Apple Watch or earlier, your Apple Watch is always silent when talking with you — you'll only see text in response to a query. But Series 3 and later Apple Watch models offer a more verbal Siri, who talks to you in response to your queries. Here's how to change your assistant's voice.

Open the Settings app on your iPhone. Navigate to Siri & Search. Tap on Siri Voice. Select the voice that appeals to you. Note: You may have to connect to Wi-Fi to download additional voices.

How to turn off Siri's voice on Apple Watch

Don't like hearing Siri on your Apple Watch? It's a quick fix. (Unfortunately, there's no way to currently change the volume of Siri's voice — it's either an on or off situation.)

Go to the Settings app on your Apple Watch. Select General > Siri. Tap the switch to turn off "Hey, Siri."

How to use the Siri with watch faces

As of watchOS 4, you can also create a specialized Siri watch face. Not only will it give you a customized Siri button straight on your watch face, but it also intelligently pulls in data from your calendars, photos, and more, and provides information like upcoming weather and passbook passes to you.

How to set up the Siri watch face on your Apple Watch with watchOS 4

New in watchOS 4 is the Siri watch face, which, in addition to easy access to Siri itself, offers quick, glanceable cards featuring information important to you.

Raise your wrist or tap on your Apple Watch's display to activate it. Press firmly on your Apple Watch's display. Swipe to the left through the series of available watch faces until you get to the end. Tap the + button. Scroll through the list (it's alphabetical). Tap on the Siri watch face.

How to set up a Siri watch face on your iPhone

Open the Watch app on your iPhone. Tap the Face Gallery tab. Tap Siri under the New in watchOS section or the Siri section. Tap the Add button. Tap the My Watch tab. Scroll to the left under My Faces. Tap Siri. Choose your Top Left and Top Right complications. Choose your Data Sources. Tap Set as current Watch Face to begin using.

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