How to download music from my Free Music App to my computer?

I have an Iphone but I use a free music app to download music to my phone. I want to put this free music on my computer because I just got a new Iphone and can't figure out how to get the music on the new phone. Is there a way to download the free music to my computer?

The app will only work on an iphone… Even if you did download it to your computer it would not run

I don't want to download the app. I want to download the music from the app if its possible.