I used to listen music at work. I tried instrumental songs in the morning. Heavy metal songs after evening coffee Sometimes it makes good progress but sometimes it makes situation worse. Switch between playlists,create playlists, find songs, skip songs.. lot of work! These days I'm using this app and I love this idea of a simplicity.

Different types of natures sounds also include man made sounds. It's worth giving a try and see if this works for you.

Noisli

ps
Post your personal favorite mix here. Mine: rainfall + train