During a recent waiting period for an update from the folks that do the base library for the Simple Song Collector, I found a non platform specific option to get music files that can be accessed via a browser on either Apple or Android.
There is an open source YouTube front end portal called Invidious that is hosted on multiple instances by various folks around the world. There are a list of instances here:
https://docs.invidious.io/instances/ The instances are all vetted by the authors of the software so they are free from advertising, tracking, malware, etc. It seems some of the instances will disable downloads when bandwidth usage gets too high for the hosting provider so you may need to try a couple to find one that allows it.
I tried this instance
https://invidious.darkness.services/ with my Android browser, searched for a song, picked the one I wanted, look below the video for a 'Download as' picker. Select one of the audio only options, click download button and the song should be visible in Walkout Song DJ my music.
