MIDI Opener

Name: MIDI Opener
Rating: 3.9 (81 reviews)
Author: MartianRover

The essential MIDI player

Free · In‑App Purchases · Designed for iPad

81 Ratings
Ages

4+
Years
Category

Utilities
Developer

MartianRover
Language

EN
+ 13 More
Size

329.3
MB

MIDI Opener A powerful, modern MIDI player for musicians, learners, and creators. MIDI Opener sets a new standard for MIDI playback on iOS with a fast, elegant interface and deep musical control. Load MIDI files and soundbanks from your device or directly from other apps, explore every note, and shape playback exactly the way you want. No ads. No distractions. Just music. Features * Visual MIDI playback See every note in every track as your song plays. Follow along, study arrangements, or simply enjoy the motion of music. * Tempo and key control (upgrade available) Adjust playback speed with precision or shift the key by semitone or octave to match your instrument or voice. * Advanced track controls (upgrade available) Mute or solo individual tracks to focus on specific parts or isolate instruments. * 128 General MIDI instruments Instantly change instruments per track and experiment with different sounds. * Built in effects Shape your sound with reverb, delay, distortion, and EQ. * Custom soundbanks Import and use your own SoundFont or DLS soundbanks from Files or other apps. * Synchronized lyrics Sing along with MIDI files that include embedded lyrics. * 3D visualizer Experience your music in a retro inspired 1980s style 3D note display. * Efficient and ad free Designed for smooth performance and optimized energy usage, even during long sessions. A bundled sample song is included with all upgrades enabled so you can explore everything right away. MIDI Opener is designed to be fast, expressive, and focused. Rediscover your MIDI library with clarity, control, and style.

Ratings & Reviews

3.9

out of 5

81 Ratings

Midi Opener - Review
10/27/2024

Rob "The Watchman"
Great App! Fair price! Would give five stars if you add these two features:1) Give us an option to build a Library structure with unlimited nested folders with lengthy naming conventions AND allow us to populate folders with pointers (NOT the actual Midi files) TO the Apple FILES app (like your folder that already does this). So, we get the juke box effect without having to hunt down and import the actual files every time.2) Make this app as both "Stand alone" AND as an AUV3 plug-in, that can be hosted by ios "Hosts" like AUM, Ape Matrix, various DAWs like GB, Cubasis, Loopy Pro, Zenbeats, Nano Studio 2, Logic Pro for Ipad, etc. At an absolute minimum make it function as an IAA with audio hosts. (dinosaur legacy, but theres a ton of em' out there, better than nothin')I love the features you include in your app, such as the ability to optionally use a different Soundfont, change tempo, and key, turn effects on and off individually, optional EQ section AND you actually display the name of the file (allowing lengthy titles, as Midi files can be). Well done! Stay with it!
Midi Opener - Review
10/27/2024

Rob "The Watchman"

Great App! Fair price! Would give five stars if you add these two features:1) Give us an option to build a Library structure with unlimited nested folders with lengthy naming conventions AND allow us to populate folders with pointers (NOT the actual Midi files) TO the Apple FILES app (like your folder that already does this). So, we get the juke box effect without having to hunt down and import the actual files every time.2) Make this app as both "Stand alone" AND as an AUV3 plug-in, that can be hosted by ios "Hosts" like AUM, Ape Matrix, various DAWs like GB, Cubasis, Loopy Pro, Zenbeats, Nano Studio 2, Logic Pro for Ipad, etc. At an absolute minimum make it function as an IAA with audio hosts. (dinosaur legacy, but theres a ton of em' out there, better than nothin')I love the features you include in your app, such as the ability to optionally use a different Soundfont, change tempo, and key, turn effects on and off individually, optional EQ section AND you actually display the name of the file (allowing lengthy titles, as Midi files can be). Well done! Stay with it!
good app but…
04/15/2023

Willzz3278
I love how I’m able to change instruments and tempo but the changing key option breaks every song, because whenever I open the app with the song I played before, it sounds fine, but when I choose a different song, the song is in the key of the previous one, and I always have to manually change the key, and I’m getting annoyed of this, so can you please remove the change key or at least fix it? that would really help!

Developer Response
Update to version 4.2 for the key transposition fix.
good app but…
04/15/2023

Willzz3278

I love how I’m able to change instruments and tempo but the changing key option breaks every song, because whenever I open the app with the song I played before, it sounds fine, but when I choose a different song, the song is in the key of the previous one, and I always have to manually change the key, and I’m getting annoyed of this, so can you please remove the change key or at least fix it? that would really help!
Developer Response 05/11/2023
Update to version 4.2 for the key transposition fix.
Awesome
06/19/2018

Emulated Excitement
I very much enjoyed this app. It is one of the few free midi applications, and it opens my files very well. The sound font to built in to the application actually does not sound too bad, when comparing it to the one built into my windows PC. I dream feature would either be trans pose the sound, or load a custom sound font, but like I said, it’s a dream feature. It’s free, and it does everything a free app should do. I especially like how closely integrated it is with the system, being able to play midis in the background.

Developer Response
Now you can transpose the song’s key with MIDI Opener! Thanks for your feedback.
Awesome
06/19/2018

Emulated Excitement

I very much enjoyed this app. It is one of the few free midi applications, and it opens my files very well. The sound font to built in to the application actually does not sound too bad, when comparing it to the one built into my windows PC. I dream feature would either be trans pose the sound, or load a custom sound font, but like I said, it’s a dream feature. It’s free, and it does everything a free app should do. I especially like how closely integrated it is with the system, being able to play midis in the background.
Developer Response 06/13/2023
Now you can transpose the song’s key with MIDI Opener! Thanks for your feedback.
Best MIDI file player on iOS, but…
12/11/2025

Morgan Robertson (KBY30)
This app is without a doubt the best way to open and listen to midi files on an Apple device that isn’t a Mac. It is sometimes unstable, especially when changing sound banks (.sf2 soundfont files), but it is by far the best option to use midi on iOS.With the most recent iOS update, however (iOS 26.1 [23B85], December 2025), changing soundfonts appears to crash the app no matter what; that’s why I can’t give this more than a 4 out of 5 rating.

Developer Response
Thanks for your review. The iOS 26 crash fix will be released very soon along with some other great new features!
Best MIDI file player on iOS, but…
12/11/2025

Morgan Robertson (KBY30)

This app is without a doubt the best way to open and listen to midi files on an Apple device that isn’t a Mac. It is sometimes unstable, especially when changing sound banks (.sf2 soundfont files), but it is by far the best option to use midi on iOS.With the most recent iOS update, however (iOS 26.1 [23B85], December 2025), changing soundfonts appears to crash the app no matter what; that’s why I can’t give this more than a 4 out of 5 rating.
Developer Response 12/20/2025
Thanks for your review. The iOS 26 crash fix will be released very soon along with some other great new features!

Version 4.3 Release Notes New Features • Import soundbanks directly from other apps Open and load soundbank files straight from Files, Mail, Messages, and supported music apps without extra steps. • Completely ad free All ads have been removed for a faster, cleaner, more focused experience. • Improved energy efficiency Optimized background behavior and animation timing to reduce battery usage during extended sessions. Fixes and Improvements • Fixed a critical iOS 26 soundbank crash Resolved a system level issue that could cause crashes when opening certain soundbanks on iOS 26. • Updated styling for iOS 26 Refined layout and visual details to better match the latest iOS design system.

Version 4.3

Jan 2

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