How Notify Button works
Ensure first you can control the phone music player (Spotify, Music, ...) correctly using the official app
Open the music player on your smartwatch, if there is no music player app running (notification visible) on your phone, then Notify will enter in Button mode and show you custom button actions as songs.
Use the Next and Previous buttons on your smartwatch to select which action to run. Use the Play/Pause action to run the current selected action
The state of music player showed on phone is playing song, you can ignore it. Always use the Play/Pause button to trigger the action
Warning: Watch musicplayer may not start immediately, please wait some seconds after you open the music player on the smartwatch to allow Notify app force music player restart
1) Open the music player on the smartwatch
2) Choose which action to run using next/previous buttons on the smartwatch
3) Run the button action using the Play/pause button on the smartwatch