Jio music is not at all a good app for steaming song. It donot have soo many varieties of songs. It has very less song in whatever genre you search for. I had gone through this app completely. Also the interface of this app is not good.
The does allow you to download music but it might not have the song which is in your niche. In the jio music app it is very tough to search for a song. Sometimes it gives irrelevant search results.
The jio sim users can have a benefit of customly choosing their caller tune. And honestly that is the only good feature I noticed about the app.