I get the feeling too that it is meant to be for practicing which it would be good for. Just to lay some drums and bass for example and then play guitar to it etc.
One thing that is not seen in other apps on Android is the sequencer (it is possible to do the same things in most DAW's if one feels so inclined). There is no stepping in and out of different tracks, everything is on track and the instruments can be chosen from the sidebar.
So it is very simple to differentiate the different tracks and instruments as they are colour coded. This is great as you can see what any given track is up to while composing.
It is for free, no publicity and open source!