This app was mentioned in 3 comments, with an average of 1.33 upvotes
Try Groove Planet http://toucharcade.com/2015/12/07/groove-planet-review-click-track/ they also just released on android https://play.google.com/store/apps/details?id=com.animocabrands.google.Musici
I posted the name 5 secs ago. It's called Groove Planet on Android