Umbrex: Music Player for Plex
Visualizer, Key & BPM, DJ Mix
$7.99 · Designed for iPad. Not verified for macOS.
A music player for Plex and your own files: 35 reactive visualizers, on-device key and BPM, and tempo and key sync for AUM, MIDI gear, and Pocket Operators.
A music player for your Plex Media Server and your own files, with 35 reactive visualizers and on-device key and BPM analysis.
Stream your Plex library or import from the Files app, and keep each source in its own library. Let the visualizers move with the music, fullscreen or inside the album art. Then find the key and BPM of every track and mix in key with Camelot-wheel colors.
Umbrex can also lead the jam. It sends the playing track's tempo and key to AUM over MIDI, so your delays stay in time and PitchLock follows the song's key for instant karaoke. It sends MIDI beat clock to any app or gear that follows clock, and it can clock a Pocket Operator over an audio cable so you can remix along.
Analysis runs entirely on your device: your music is never uploaded. No sign-up, no ads, no tracking.
FEATURES
• Plex Media Server streaming with plex.tv sign-in, including synced lyrics from your server where available
• Download Plex tracks and keep listening offline
• 35 reactive visualizers that move with the music, fullscreen or inside the album art
• Artwork that pulses on the beat
• On-device key and BPM detection for your local and Plex tracks
• Camelot-wheel keys for harmonic mixing
• Sort, filter, and build Up Next queues by key and BPM
• DJ modes: beatmatched transitions between tracks, in order or shuffled
• AUM Sync: send each track's tempo and key over MIDI
• MIDI beat clock, locked to the track's beat grid
• Pocket Operator sync over an audio cable
• Slowed + reverb and nightcore remixes, artwork treatment included
• 10-band graphic EQ with presets and a preamp
• CarPlay, Siri, and Shortcuts support
Supports MP3, AAC/M4A, WAV, AIFF, FLAC, and CAF files.
Key and BPM analysis, the waveform seek bar, beatmatched DJ transitions, beat-synced effects, and tempo and key sync require iOS 27 or later. Playback, Plex, visualizers, the EQ, remixes, and CarPlay work on iOS 18 and later.
Ratings & Reviews
What's new:
• Improved the iPad player layout so it works in portrait, Split View, Slide Over, and resized windows
• Fixed the player staying scrolled down after resizing an iPad window
• Fixed scrolling and dismissing the player while the visualizer is showing
• Improved Plex settings with a clearer server connection and a separate custom address section
• Added more breathing room to song rows on iPhone
The developer, NATHAN THOMAS MATHIS, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- NATHAN THOMAS MATHIS
- Size
- 6.5 MB
- Category
- Music
- Compatibility
Requires iOS 18.0 or later.
- iPhone
Requires iOS 18.0 or later. - iPad
Requires iPadOS 18.0 or later. - Mac
Requires macOS 15.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 2.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Copyright
- © 2026 Nathan Mathis
