Question: what is the best music app to download free music?
Answer: SoundCloud Downloader. Note: requires Xposed Framework and rooted Android device. ... 
NewPipe. While NewPipe still feels like a bit of a work in progress, it certainly does the job when it comes to downloading music. ... 
YMusic. ... 
GTunes Music Downloader. ... 
SONGily. ... 
TubeMate. ... 
4Shared. ... 
Audiomack.