Not really necessary for the modern versions of iOS because Apple finally got out of their own way by integrating output to multiple AirPlay speakers. I had an Android tablet a few years ago, and had this app installed and on an older iPad (pre iOS 11.4) to accomplish multi output. I just purchased a Galaxy Tab and hoped this app still existed. it does and it works flawlessly with various sources. I have not tired it with my music library, but honestly, I like listening to new steaming music sources with the Internet radio built in. It is a great app for accomplishing AirPlay on an android. And since this tablet has a 10" screen, this app is also pleasing to the eye..