You probably already know the Apple Watch is great at making phone calls. It’s still something of a secret, though, that you can unleash your inner Dick Tracy by using the Apple Watch as a walkie-talkie. As long as the person on the other line has you as a contact in their Apple Watch’s Walkie Talkie app and has watchOS 5 installed, you can immediately contact them with a real-time voice message regardless of where they are or what they’re doing.
In the wrong hands, of course, this could be maddening. Fortunately, Apple makes it easy to turn the feature on or off, and it’s also easy to get rid of contacts who abuse it. You can also add a complication for easier access.