A simple Pebble remote for switching Spotify playlists. Requires Android-only companion app.
Why doesn't this support free Spotify users? There's no way for a third party app to launch a playlist for a free user.
Why do I have to manually launch Spotify? I'm currently looking into a way around this.
For more details on the Android companion app, see https://github.com/tonycosentini/spotify-remote-android.