字幕表 動画を再生する 英語字幕をプリント You may find yourself in situations where you need to use your Apple Watch without an iPhone. While features will be limited, you're still able to use some functions of the Apple Watch. On the Apple Watch, you'll see a red icon with a diagonal slash through the middle. This indicates that the Apple Watch is not currently connected to an iPhone. You will have more access to functions if you're running the latest watchOS or if you have access to cellular services. However, if you only have Wi-Fi available, you will still be able to use some apps. While you're connected to Wi-Fi, you can receive iMessages, use Siri, listen to music, and use any apps that work with Wi-Fi. If you don't have any access to Wi-Fi, you can still utilize a few functions. If you have music or podcasts that have been previously downloaded to your Apple Watch, you can still listen to them. You're able to monitor your heart rate and your activity. You can still set any alarms and timers on your Apple Watch. You can also use Apple Pay without Wi-Fi, which is useful if you happen to forget your iPhone.