Power Hour - You can use it on desktop or mobile. You can use it on the Chrome browser.

You just need to install it and start the Spotify music.

You will see a box at the top of the screen with an icon for Power Hour.

You will also see a button named Settings.

The app will start playing the next song every 60 seconds.

You can adjust the volume for the sound effect between songs by using the slider.

You can also disable the sound effect between songs by clicking the bell icon.