you don't need to log in to use the app.
if you haven't been able to, their website has a direct link to download the apk. link
no, and you don't even need to log in to use it.
I wanted to share this open-source alternative to Spotify/YouTube Music for Android that I found. It's ad-free and VERY CUSTOMIZABLE. This definitely deserves so much MORE recognition. https://github.com/koiverse/ArchiveTune
you don't need to log in to use the app.