I’ve been using it to listen to actual MP3s of the music I have. I can’t find any decent MP3 player on iOS (incredibly ironic given the iPod was one of the 3 devices the iPhone was supposed to be when Steve Jobs first introduced it) and VLC is pretty good.

Foobar2000 is my go to on iOS. Works well just like the PCs version.

Android version is also the best I've found without ads, has a decent UI and plenty of advanced features.

I’m using VLC because it’s the only one that I know that can play opus. I chose the latter for lossy encoding because I have a few albums that are gapless and it’s hackish to get mp3 to support those (other than single mp3 file and cue file).

Also available on tvOS and you can watch video files from your home NAS or just send them from your iPhone/iPad!

I find it handy for streaming videos from my Jellyfin server with good subtitling support, then casting to a TV!

How do you manage this? Just copy the stream URL from Jellyfin Web or…?

Yup the Stream URL is a valid HTTP media!