Privacy, and the deal generally
Metrunome is a hobby project. One person, evenings. Here it is in plain words, because nobody reads the other kind.
The short version
Use it however you like. Metrunome may close your account, change how any of it works, or shut down tomorrow, without notice or explanation. You don't owe Metrunome anything and Metrunome doesn't owe you anything. No warranty, no guarantees, no promise that it works or keeps working, no support. If that isn't a deal you want, don't sign in — genuinely, no hard feelings.
Your playlists live in your Spotify account. If Metrunome disappears overnight, they stay exactly where they are.
What Metrunome asks Spotify for, and why
- Create and edit playlists — making playlists is the entire point.
- Read your playlists — so you can import one, or build a new one from the artists in it.
- Read your Liked Songs — so an update knows which tracks to keep.
- Add and remove Liked Songs — that's the heart button next to each track. Un-hearting here removes the song from your Liked Songs everywhere, not just in Metrunome.
- Read your top tracks — so "your library" can be used as a starting point.
Metrunome never sees your Spotify password. Signing in happens on Spotify's side, and all that comes back is permission to act on your behalf.
What Metrunome stores
- About you: your Spotify user id and display name, the token that lets Metrunome act for you, which permissions you granted, and your tempo-tolerance setting.
- About your playlists: the Spotify id, the BPM, what it was built from, how much music you asked for, and how much it ended up with.
- What you did here: a plain log — signed up, created a playlist, deleted one, banned a track. It exists to show whether any of this actually works.
No analytics, no trackers, no advertising, nothing sold to anyone. There is exactly one cookie and it keeps you logged in for 30 days.
What leaves the app
- Spotify — obviously; everything above happens in your account.
- Deezer — artist names and song titles get sent there to look up tempos, because Spotify stopped providing them. Nothing about you goes with it.
- That's the lot.
One thing that is shared between everyone
Tempos are cached in a single table keyed by artist and title, so a song is looked up once for the whole service rather than once per person. It isn't tied to you and says nothing about you — a song's tempo is a fact about the song.
Banning a track is not shared. It applies to your playlists only. Someone deciding a song is at the wrong tempo is an opinion, and it shouldn't quietly disappear from a stranger's playlists.
Getting out
Settings → Close my account deletes your account and the playlists Metrunome was tracking, immediately and for good. Then revoke Metrunome at spotify.com/account/apps so the permission is gone too.
Your Spotify playlists survive all of this. They're yours; nothing is deleted over there.
What stays afterwards is the anonymous shape of it: that an account was created on some day, that a playlist was made at some BPM and came out some length. Your name, your id, what you searched for, what you liked and what you banned all go. The counts remain because the point is knowing whether this thing gets used — not knowing that it was you.
Getting in touch
contact@metrunome.com. Still one person and still evenings, so a reply may take a while or may not come at all. Worth writing to if something is broken, if you want your data gone and the button above didn't do it, or if metrunome is doing something with your account you didn't expect.
Where it runs
On Heroku, in the United States. If you're in Europe, that means your data crosses the Atlantic. Now you know.
Not affiliated
Metrunome is an independent project. It isn't made by, endorsed by, or connected to Spotify or Deezer in any way.
Last updated 30 July 2026. If any of this changes, this page changes, and that's the announcement.