I'm using Symfonium. Originally got it because it allows pulling from subsonic, plex and jellyfin libraries simultaneously.

After switching all my stuff over to navidrome, rather than having it split between plex and navidrome, I kept it because I paid a couple bucks for it and really like the customizability

On my PC I use sonixd. No particular reason for that one except it was probably the first one I found, is cross platform and also looks quite good

+1 for Symfonium. Well worth the investment, I use it every day

I like symfonium. It's so polished.

I've used Ultrasonic, DSub, Audinaut, Substreamer, SubTune, Tempo and Subtracks over the years. I'm currently using Symfonium (I can't live without a genre list with album grouping)

substreamer on android, and feishin on windows

Over the last few days I've tested substreamer, DSub, Symfonium, Ultrasonic and Tempo. I thought that Symfonium was the clear winner (once I'd found the setting to use a local cache) with DSub being next. I wanted to be able to browse albums by genre - others might not care and rate them differently.

Symfonium is closed source and not free, which might be a deal-breaker for some, but it's a small one-off payment to an indie dev which is A-OK with me. Turns out it's the same dev that wrote Yatse (xbmc/kodi remote) which I'd also paid for.

edit: Ah, the other comments hadn't federated - I see I'm in good company!

I use Ultrasonic, which I used with Airsonic before I switched to Navidrome. I need to look into it though, since apparently I now stream FLAC without transcoding and it kind of eats into my mobile data limit... Also, the local cache doesn't seem to work anymore. Don't know if the issue lies with my phone or Navidrome. I installed Tempo but still have to look into that.

Substreamer looks nice. Too bad it's a Play Store thing which kind of conflicts with my de-googled phone. I do have a few apps from the Play Store (banking kinda sucks in a browser) but I try to limit them where I can.

I use Symfonium but it is not open source, unfortunately

Substreamer on iOS, I've been getting surprising amounts of mileage out of the "play random song from your library" feature recently.

Dsub, because It's very stable with just enough features and a usable UI. Ultrasonic is close, but there's a glitch I'll have occasionally that causes my music to play twice. Haven't checked to see if it's been fixed in a while. Substreamer is very pretty. Last time I checked, it was missing gapless playback. Synphonium has a weird tendency towards offline. I believe playlists wouldn't update right. But the main reason I don't use it is that it's the only paid app, and I'll occasionally not have the Google Play Store.

I use Ultrasonic.

I've been using dsub but it has a lot of weird bugs (I might try to fix someday). Testing symphonium now and it seems pretty nice so far. Thanks for the recommendation!

On macOS I use SuperSonic. Sadly, there's nothing I really love on iOS. Substreamer and play:Sub are probably the best.

I’m still up in the air on this one. I’ve been playing with Substreamer and Amperfy (https://github.com/BLeeEZ/amperfy), both on iOS. Hadnt heard of Tempo before, but I’m going to check it out. I honestly haven’t fallen in love with anything yet.