It allows 14. I handed the different parts, minus the bass, around the different "machines" placed in the app. I wanted to get a little bit of a feel for each one...and each of them are stripped down versions of full synths, such as a saw, FM, subtractive, etc. It's called Caustic, and it is free to try, minus export and saving on Android. There is also a version you can download for windows which is completely functional.
It's a fun thing to doodle with, and I think it will help me learn on a full DAW as well:)