When I go on vacation I prefer to keep my smartphone with WiFi and mobile data off, but I really don’t like the way Spotify handle offline content. Most of the time it doesn’t download everything and when I do a research, it show me even content that’s not available offline (how can it do that?). Is there a selfhosted service that I can use to download my playlists and play them with an Android app that can download them?
Yes kind of but it is not strictly allowed and can be considered piracy. Their are some tools for this available on github that can save songs as mp3. Then you can play them in any audio player you like. If you want to know the name of one of those tools just send me a DM.