Privacy

Katalog keeps your music on your Mac. This page lists everything that does leave it, and what this website records. Last updated 19 October 2026.

Your Music Stays on Your Mac

Your audio files, tags, playlists and the library database never leave your Mac. Katalog does not upload them, not for analysis and not for matching. Tempo, key and waveforms are worked out on your Mac. There is no account to make.

What the App Sends

• Update checks.About once a day, and when you choose Help ▸ Check for Updates, Katalog asks musickatalog.com whether a new version is out. With that request it sends a random ID made on your Mac when Katalog was first opened, and the app's build number. The ID is not tied to your name, email or licence. The server keeps a one-way hash of the ID and a one-way hash of your network address, never the address itself, plus the build and the app and macOS versions the request names. This is how we know how many copies are in use.
• Licence activation.When you enter a licence code, the app sends that code to musickatalog.com and gets your licence key back. After that the licence is checked on your Mac, offline.
• Problem reports.Only when you send one from Help ▸ Report a Problem. It carries what you typed, the app's build, your macOS version, and your email if you add one.
• AI and Discogs features.Only if you enter your own key in Settings. These requests go straight from your Mac to Anthropic or to Discogs, under your own account with them, and never pass through our server. An AI search sends the question you typed and a description of the library's columns, not your tracks. Their privacy policies cover what they do with it.
• Search links.Search buttons open your browser at Google, YouTube or Discogs with the track's name. That is your browser visiting those sites, not Katalog.

Buying a Licence

Payment is handled by Stripe. We never see your card. Stripe passes us your name and email so we can send your licence key, and we keep them with the key so it can be sent again if you lose it. Stripe's own privacy policy covers the payment.

This Website

musickatalog.com counts visits with its own small script on our own server. It sets no cookies and uses no third-party analytics or ad tracking. It records the page, the site you came from, an approximate location (country and city) worked out on our server, and your device type, browser, operating system and language. Your IP address is not stored; a hash that changes every day counts unique visitors. Downloads are counted the same way.

The page loads one typeface from Google Fonts, so your browser fetches that file from Google.

Who Sees It

Only us. We do not sell or share any of it. The services that run parts of this for us are Stripe (payments), Hostinger (the web server) and Titan (the email that sends licence keys).

Your Data, Your Call

Write to info@musickatalog.com to see what we hold about you, or to have it deleted. We keep licence records for as long as the licence exists, so a lost key can be sent again.

Who We Are

Katalog is made by TG Labs. Questions about this page: info@musickatalog.com.