Update on my review on the last version: the issue with app crashing persists. The developer has been responsive and cooperative in trying to find the problem but no luck so far. I have a large library of music (about 9,500 songs) and if I shuffle the entire library the app will eventually crash. When that happens, I have to delete the app and reinstall, which means I also have to re-enter all of my settings. If you dont have a large library this issue may not affect you (up to 3,800 songs seems to work OK).
Version 6 brings changes to the BGS profiles. The iPhone speaker setting is now gone, which is disappointing.
Aside from those issues, the app is great and, like Ive said, the developer is responsive to complaints and bugs. I may be moving back to Cesium until the problem gets resolved.