HS Piano Plus 2.1
haostaff.com is an ALL-FREE downloading site for Hao Staff as well as traditional piano sheet music formats.
This app includes an in-app library of top-10 downloaded pieces from the site.
Hao Staff is a visual piano notation that everyone can understand and read within minutes.
2-minute video tutorial to get you started - get to know how simple the piano keyboard is and how easy it is to read Hao Staff.