The short version: try everything free for 30 days, pay once if you want the extras, and keep a backup of your library. Last updated 19 October 2026.
The full version is free for 30 days. After that, the library, browsing, search, playback, playlists and editing tags by hand stay free for good. Tools, AI features, effects, DJ exports and automatic metadata need a licence.
Katalog works on your own files and can write to their tags and to other apps' libraries when you ask it to. It asks before anything it cannot undo. Keep a backup of your music and your library, with Time Machine or another copy, especially before a first import or an update.
Katalog is in beta. It is provided as it is, without a promise that it is free of bugs. As far as the law allows, our responsibility for any loss is limited to what you paid for the licence.
The AI and Discogs features use keys from your own accounts with those services. Their terms, and any cost they charge, apply to that use.
If these terms change, the new version is posted here with a new date. A licence you have already bought keeps what it was sold with.