# Rotation: DJ USB Player

> iPhone music player for DJ USB drives, analyzing track compatibility and building sets. (iPhone/iPad app by Kristofor Syphers.)

- Source: https://appshunter.io/ios/app/rotation-dj-usb-player/id6827842243 (this page in markdown: same URL + `.md`)
- Developer: [Kristofor Syphers](https://appshunter.io/developer/1896781165)
- Category: Music
- Price: Free
- Rating: 5.00/5 from 1 App Store ratings
- Age rating: 4+
- Requires: iOS 18.0 · 6 MB
- Languages: Korean, American English
- Released: 2026-10-31
- Data updated: 2026-11-05
- Monetization: free

## What is Rotation?

Rotation turns the USB drive you DJ with into a music library on your iPhone. Plug it in with a USB-C adapter and your rekordbox playlists, keys, BPM and artwork are right there, so you can get to know your music anywhere: on the train, at the gym, before the gig.

READ-ONLY, CDJ-SAFE
Rotation never writes to your USB. Nothing on the drive is changed, moved or added, so it stays ready to plug into the decks.

A MUSIC PLAYER, NOT A DJ APP
No waveforms or decks. Just a clean player with your playlists, search, sorting, a queue, shuffle and repeat, plus background playback and lock screen controls.

KNOW WHAT MIXES
• Tracks in a compatible key light up green, using the Camelot wheel
• "Mixes with" shows every track that works after the one playing
• Like tracks, and pair the ones that blend well with notes like "mix in at the breakdown"

AUTO ROTATE
Pick a track and Rotation builds a set from it, choosing what comes next by key, tempo and energy. Keep it steady, build up or wind down. Transitions beatmatch over 8 bars with a bass swap using your rekordbox beatgrids, crossfade, or mix it up. Swap or lock upcoming tracks, and save sets you like.

PRIVATE BY DESIGN
No account, no ads, no tracking. Your likes, pairs and saved sets stay on your phone.

Works with USB drives exported from rekordbox with the standard device library (export.pdb).

rekordbox and CDJ are trademarks of AlphaTheta Corporation. Rotation is an independent app and is not affiliated with or endorsed by AlphaTheta or Pioneer DJ.

## Key features

- USB drive music library access
- Playlist organization
- Track key and BPM analysis
- Automatic DJ set building
- Background playback
- Lock screen controls

## Is Rotation safe?

Not enough ratings yet to assess Rotation.

## Is Rotation legit?

Rotation: DJ USB Player has limited verification signals. The AppsHunter Legitimacy Score for Rotation is 58 out of 100 points across 7 verification signals from App Store and developer data.


## Frequently asked questions about Rotation

### What is Rotation?

Rotation is an iPhone music player designed to access your DJ music library stored on a USB drive. It allows you to view playlists, analyze track compatibility, and build DJ sets directly from your phone.

### Does Rotation modify my USB drive?

No, Rotation is read-only and CDJ-safe. It never writes to your USB drive, ensuring that nothing on the drive is changed, moved, or added, so it remains ready for use with DJ decks.

### Can I mix tracks with Rotation?

Rotation helps you understand what mixes well by showing tracks compatible in key using the Camelot wheel and suggesting tracks that work after the current one. You can also like tracks and pair them with notes for easy mixing.

### How does Rotation build DJ sets?

The Auto Rotate feature picks a track and builds a set by choosing the next track based on key, tempo, and energy. You can control the set's progression (steady, build up, wind down) and manage upcoming tracks.

### Does Rotation have ads?

No, Rotation is private by design and does not have any ads. It also does not use tracking, ensuring your personal music preferences and saved sets remain on your phone.

### What devices does Rotation support?

Rotation is currently supported on iPhone devices. It requires a USB-C adapter to connect your USB drive to your iPhone.

### How often is Rotation updated?

Rotation was last updated on October 31, 2026, with version 1.0. As a new release, future updates will likely focus on adding new features and improving performance based on user feedback.

### Is Rotation suitable for beginners?

Rotation is a music player, not a full DJ app, focusing on library management and set preparation. Its clean interface and features like "Mixes with" can help users understand track compatibility, making it a useful tool for learning about mixes.

## Version history (last 1 release)

### 1.0 — 2026-10-31

No release notes.

## More apps by Kristofor Syphers

- [InDecks: TrackID](https://appshunter.io/ios/app/indecks-trackid/id6771469203)

All apps by Kristofor Syphers: https://appshunter.io/developer/1896781165

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-11-05.*