Edit once. Every DJ library follows.
Cratopus keeps your tracks, cues and playlists the same in Rekordbox, Serato and Traktor. Fix a title, name a cue or build a playlist once and it reaches all three, without ever overwriting a change you made.
Copper Wire
Lenz & Holm · Copper Wire EP
MP3 · Analysed
- BPM
- 124.00
- Key
- Fm
- Elapsed
- 2:34
- Remain
- −1:33
- 1Intro
- 2Build
- 3Main
- 4Break
- 5Drop
- 6Outro
- 7—
- 8—
Works withRekordboxSeratoTraktor
One library. Three DJ apps that agree.
Cratopus holds the one copy of your library and treats each DJ app as a copy of it. Every change you make reaches all of them, and the changes you make in them come back the same way.
- 01
Edit
Change a title, a cue, a beatgrid or a playlist in Cratopus.
- 02
Push
Cratopus writes it into each library in that library’s own format.
- 03
In sync
Every library shows the same thing. One that’s open gets it when you close it.
Copper Wire · cue 5 named Drop, BPM set to 124.00
- Rekordboxmaster.dbIn sync
- SeratoCrates and file tagsIn sync
- TraktorOpen · goes in when it closesWaiting to push
Your edits win
A change you make in Cratopus is never overwritten by a library, even one that changed the same track before your edit reached it.
A backup before the first write
Before Cratopus changes a library for the first time, it saves a copy that is never deleted, then keeps the last 20 versions.
Never while your DJ app is open
Cratopus writes to Rekordbox, Serato or Traktor only while it’s closed. Changes wait and go in when you quit it.
Your whole library on one panel.
Prep in a window built like your gear: a deck to check every cue and grid, and a track table built for libraries of 10,000 tracks and more.
- Analysis
- Beatgrids, BPM and downbeats from Beat This!, a beat tracker that runs on your Mac. Nudge the downbeat a beat at a time.
- Cues
- Eight coloured, named hot cues per track, the same in every library.
- Playlists
- Make one here or in any of your DJ apps. It shows up in the others, in the same order.
- Smart playlists
- Rules over BPM, key, genre, rating, energy or date added that keep themselves up to date.
- Tags
- Edits go into each file’s own tags. Everything else in the file stays exactly as it was.
- Files
- If you like, Cratopus files your music into folders named your way, and every library follows each move.
- Duplicates
- Finds the same song twice and suggests which copy to keep.
- Recently deleted
- A deleted track waits 30 days, playlist places and all, in case you want it back.
Your library on every Mac, and in your pocket.
Cratopus Cloud keeps your tracks, cues, playlists, beatgrids and the audio itself the same on all your Macs, and backs it all up. Sign in on a new laptop and your library arrives, files included.
On your iPhone, listen to your music on the go and prepare for a set on the way: rate tracks, build playlists and add to tonight’s set. It’s all waiting on your Mac, and in your DJ apps, when you get there.
Straight answers.
Can Cratopus damage my Rekordbox library?
It’s built not to. It writes only while Rekordbox is closed, and before its first write it copies master.db to a backup it never deletes. That copy is an ordinary file you can put back at any time.
Do I have to pay?
No. Cratopus is free on your Mac, with every library. Cloud is the paid part, for keeping several Macs in step, from €7 a month.
What if I edit in Rekordbox, Serato or Traktor?
Those edits come back into Cratopus and go on to your other libraries. If you changed the same thing in Cratopus and that library hasn’t received it yet, your Cratopus edit wins.
What does it work with?
Rekordbox 6 and 7, Serato DJ Pro and Traktor Pro 4, on a Mac with macOS 26 or later. You don’t need any of them: Cratopus works on its own as your music library too.
What happens if I stop using it?
Nothing breaks. Your libraries stay ordinary Rekordbox, Serato and Traktor libraries, and your music stays where it is.