MIDI Opener is made and published by MartianRover. AppBrain is an independent app data site and isn't affiliated with MartianRover. The app name, icon, screenshots and description belong to MartianRover and are shown as published on the App Store.
AppBrain's verdict
Established- Rating on App Store
- 3.90
- 86 ratings
- Last updated
- October 22, 2026
It doesn't have enough ratings yet to judge what users think.
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Similar apps and more from MartianRoverAlternatives to MIDI Opener
Releases
Updates seen on the App Store- Version
- 5.7
- Launched
- September 2015
No changelog data
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Technology
Found in the app by AppBrain- Price
- Free
- App size
- 334.0 MB
- Content rating
- Everyone
Technologies used by MIDI Opener
About the app and developer
About MIDI Opener
MIDI Opener is an utilities app developed by MartianRover.
What is the rating of MIDI Opener?
MIDI Opener is rated 3.90 out of 5 stars, based on 86 ratings.
Is MIDI Opener free?
MIDI Opener is free. The app size is 333.96 MB. The latest version available is 5.7. The last update was on October 22, 2026.
What are the requirements for MIDI Opener?
The app has a content rating of Everyone. The app has been available on the App Store since September 2015.
Developer information for MartianRover
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Store listing
By MartianRover, from the App StoreDescription by MartianRover Written by the developer, not by AppBrain. Click to read.
Open any MIDI file and take full control of your music.
MIDI Opener is a fast, precise MIDI player built for musicians who want to practice smarter, isolate parts, customize arrangements, route playback to external gear, export their changes, and deeply explore songs without the complexity of a DAW.
WHY MIDI OPENER
• Instantly open and play standard MIDI files (.mid, .midi)
• Ultra-responsive playback with zero clutter
• Built for practice, learning, live performance, and musical exploration
• Completely ad-free
POWERFUL PLAYBACK CONTROL
• Change tempo in real time (slow down or speed up)
• Transpose key instantly to match your instrument
• Mute, solo, and adjust volume for each track
• Swap instruments using all 128 General MIDI sounds
• Import custom SoundFont (.sf2) and DLS soundbanks
• Apply reverb, delay, distortion, and EQ effects
EXPORT YOUR CHANGES
• Export audio as MP3, M4A, or WAV
• Export modified MIDI files with your changes
• Save customized practice mixes and arrangements
• Perfect for backing tracks, sharing, and rehearsal prep
PRACTICE WITH PRECISION
• Loop any section with A–B looping
• Isolate difficult passages and repeat them
• Break down complex songs into manageable parts
• Save and instantly restore full practice setups with Snapshots
Perfect for pianists, guitarists, producers, singers, music directors, and students.
MIDI OUT & EXTERNAL DEVICES
• Send MIDI playback to external keyboards, synths, drum machines, and sound modules
• Connect over USB, Bluetooth, or Wi-Fi
• Compatible with Logic Pro, Ableton Live, GarageBand, and CoreMIDI apps
• Use premium external instrument sounds and studio hardware
SING AND PRACTICE
• View embedded lyrics when available
• Real-time word highlighting synced to playback
• Great for karaoke and vocal practice
SEE YOUR MUSIC
• Clean, readable note timeline
• Beautiful full screen Focus Mode with ambient visuals, auto hiding controls, and optional synchronized lyrics
• Track based visual layout
• Retro 3D visualizer
• Multiple visual themes
ORGANIZE YOUR MIDI LIBRARY
• Import from Files, AirDrop, Mail, and other apps
• Create playlists
• Queue songs for continuous playback
UPGRADE OPTIONS
Free — The Player & Customizer
Open and play MIDI files with powerful built-in customization tools. Includes instrument swapping with all 128 General MIDI sounds, custom SoundFont and DLS support, synchronized lyrics, audio effects, song section looping, visual themes, saved mixes with Snapshots, playlists, queue support, and a complete MIDI song library experience—all in a fast, focused, ad-free player.
Practice Pack — The Musician’s Upgrade
Unlock advanced practice and arrangement tools including real-time tempo control, key transposition, per-track mute, solo, and volume controls, plus MP3 audio and MIDI export for creating custom practice mixes, backing tracks, and arrangements.
MIDI Out — The Producer’s Upgrade
Route MIDI playback to external keyboards, synths, drum machines, DAWs, and professional music hardware over USB, Bluetooth, or Wi-Fi using CoreMIDI.
All Access — Everything, Once
Get the complete MIDI Opener experience with every upgrade included, plus discounted upgrade pricing if you already own another product.
FAST. FOCUSED. NO DISTRACTIONS.
Made for musicians who want control—not complexity.