Perhaps not the best notation editor around, (I don't know, maybe it is ... ), an Android app called "Mobile Sheets" is otherwise very good. It does about everything reasonably expected, and so far I haven't had any problems, not of my own making, with it. You can create setlists, identify sheet music in many different ways (title, artist, genre, type, collections, key, etc.). It does have an editor feature, but you would need a blank notation image (pdf, jpg, etc.) to create your own composition. The editor is very handy for annotating existing sheets, but not for use capturing midi takes by itself. This app is mainly for managing existing sheet music collections, and setlists.