I run Dark Noise from my iPhone to my HomePod a lot. It’s a great background noise app with an intelligent design made by Charlie Chapman. (Charlie was a guest on Automators a few months ago.)
Charlie’s now released version 2 of Dark Noise with several new sounds – Rain on Tent is my favorite new one – plus the ability to mix sounds so you could have wind and rain if the mood strikes you. Additionally, this new version will sync your settings between multiple devices, adds iPad cursor support, and adds even more app icons.
As before, Dark Noise has excellent automation support. I have several Shortcuts that involve context setting, and several of them start up a Dark Noise sound as step one—my congratulations to Charlie on an excellent release. If you haven’t already, go check out Dark Noise.