However, to listen to music offline, you need to download these playlists or single tracks to the watch. You can stream these tracks even without your iPhone once the watch is connected to Wi-Fi. If you go to the music app on your Apple Watch, you will see that the selected playlist has been added to the watch. how to add music to Apple Watch with Apple Music The selected playlist or track will be downloaded to the watch when it’s connected to WiFi and charging. If you wish to add a single track, follow the same process and select the tracks you wish to add. Now, tap on the plus icon at the top right corner to add the playlist to the watch. Tap on Add music, tap on playlists and select the playlist you want to add to your Apple Watch. Open the Apple Watch app on your iPhone, scroll to music and click to open.