I think it could be a good idea to allow users to play a quick audio file/ ringtone when custom alerts are triggered. I.e. a chime or bell for when a sales or revenue target is met.
It would be great to have two pieces of functionality:
1. The ability to set the custom alert noise in the Flow process itself (for instance, by creating up to 10 "alert" variables and and saying a particular Flow process would invoke "alert #2" or "alert #1")
2. The ability to set the custom alert noise in the Flow app locally on the mobile device (to take a custom ringtone and apply it to "alert #1", "alert #2", etc.)