nana is a Music Collaboration app that provides Instant Online Music Session in the palm of your hand to all music lovers for free. Use your smartphone as a song recorder & overdub your singing to collab! You can also use it as a karaoke app to enjoy free karaoke. Record your music and share it around the world right now! Features - Your smartphone becomes a recorder of your creation! Record your music with simple & easy recording option - Collab to make new music by overdubbing and layering