请问手机客户端和手机音乐客户端怎么用英语表达？

什么乱七八糟的。应该是：
The music player for handphone (mobile) 手机音乐播放器
Client software for mobile 手机客户端

客户端用 client-side 会不会好点？
client-side for mobile

phone client
phone music player

Mobilephone client
Mobilephone Music player