Pandora's latest version of its iOS app contains a "brand new, built-in app that is seamlessly integrated into the Apple Watch experience." From your wrist you will be able to control the playback or give Thumb up to which song is currently playing on Pandora. But even better is that the Pandora's Apple Watch app includes offline playback so you can leave your phone at home and listen to a playlist while on the move.
Only Pandora's paying customers get this feature, so you need to subscribe to either Pandora Plus or Pandora Premium – the company's full Spotify / Apple Music competitor ̵
When you first open it, you see text saying that Pandora automatically syncs music when it is near your iPhone. After a few minutes, my PlayStation Radio playlist turned on, but it's not quite clear how to choose which music is stored on Apple Watch.
Apple's watchOS 5 is required to use the new Pandora watch app.