4Hand学音乐 app for iPhone and iPad 4.8 ( 768 ratings ) Education Developer: 世飞 喻 Free Current version: 3.3.0, last update: 1 year ago First release : 12 Feb 2019 App size: 85.6 Mb 学音乐一个app就够了!视频教学,教师辅导,乐理题库应有尽有!