I recently switched from Apple Music to Spotify and one feature I was surprised was missing was a notification on song changes. I built an app to add this feature and also the ability to control Spotify via the menubar.
One fun emergent behavior is that because Spotify synchronizes player state between all your devices, you can play music on your phone, and if you have Spotify open on your desktop, it'll show notifications for all songs and even let you control playback.
Happy for any and all feedback!
