Which music apps can show in your Slack status
Short answer: Spotify and Apple MusicThis one isn't really about TuneStatus. On a Mac, whether a tool can see what you're playing depends entirely on whether the music app is willing to say — and most of them aren't. Here's the actual state of it.
Spotify — yes
The Spotify desktop app publishes what it's playing to other apps on your Mac, so TuneStatus can just ask it. No login, no account access, no permission screen. Free and Premium behave identically, because Spotify's servers are never in the loop. This is the free tier of TuneStatus.
Apple Music — yes, with Pro
The Music app publishes the same way, and TuneStatus reads it exactly as locally. That's TuneStatus Pro: $4.99 once, not a subscription. Radio and some streaming stations don't report a readable track, so those show nothing rather than something wrong.
Tidal — no
Tidal's Mac app doesn't expose what it's playing to other apps at all. There's no supported way to ask it, so no tool can read it reliably — not TuneStatus, not anything else. This isn't us declining to build it; there's nothing to build against.
YouTube Music — no
There's no real Mac app; it's a web page. A website can't be asked what it's playing by another app on your machine, and browser extensions that try are fragile and break on every redesign. Same answer for anything else that lives in a tab.
Amazon Music, Deezer — no
Same reason as Tidal. Their Mac apps keep what they're playing to themselves.
The one theoretical exception
Tidal, YouTube Music, Amazon Music and Deezer can all scrobble to Last.fm, and Last.fm will tell you what a user is playing right now. So a tool could read your status secondhand, through Last.fm, if you scrobble. TuneStatus doesn't do this — it means signing in to something, it lags by however long scrobbling takes, and it stops working the moment you stop scrobbling. Mentioning it because it's the only honest path that exists, not because it's coming.
Two more limits worth knowing
TuneStatus reads the Mac it's running on. And podcasts are never shared, from any source — that's a deliberate choice, not a gap.