# MIDI Opener — user reviews > 76 indexed App Store user reviews of MIDI Opener by MartianRover, LLC, rated 3.93/5 from 85 ratings. - Source: https://appshunter.io/ios/app/midi-opener/id1029373282/reviews - App overview in markdown: https://appshunter.io/ios/app/midi-opener/id1029373282.md - Rating breakdown: 5★ 42 · 4★ 17 · 3★ 7 · 2★ 4 · 1★ 11 ## What do users think of MIDI Opener? Overall sentiment: mixed **Pros** - 👍 Simple and easy to use - 🎶 Good sounding instruments - 🚀 Handles instrument changes well - ✨ Free to use - ✅ Plays MIDI files effectively - 💡 Developer responsiveness (feature added) - 👌 Great UI and features - 🌟 Best MIDI player on iOS - 🎵 Decent sound quality - 📂 Integrates with Google Drive/Files app **Cons** - 🐛 Crashes when changing SoundFonts (iOS 26) - 🐛 Cuts off beginning of songs - 🐛 Sustained notes treated as staccato - 💸 Charging for basic features - 📉 Poor sound quality for some instruments - 🚫 No external MIDI interface settings - 🔇 Bass drum too quiet for metal - 🎛️ Key change feature breaks songs - ❓ Unable to export edited files - 😵‍💫 App crashes on startup - 🎶 Randomly plays single track only - 🐌 Slow loading from cloud storage - ❌ Files not playing/no sound - 🔄 Automatically loops files - 🔌 No external MIDI interface settings **Commonly reported bugs** - Sustained notes are treated as staccato notes. - Cuts off the beginning of the song. - Kicked out of the app when clicking on another SoundFont. - Crashes when changing SoundFonts (iOS 26). - Bass drum is too quiet for metal music. - Changing key option breaks songs. - App crashes on startup. - Randomly playing a single track only. - Skipping individual notes when too many are playing. - New update not working, won't play audio or understand certain instruments. - Google Drive method does not work. - Download button does nothing. - Skips a lot of notes. - No sound, plays silence. - Scrolling bar with no sound. **Most requested features** - Adjust individual track volumes - Zoom in/out - Select region to play - Export features (WAV, MP3, FLAC) - Playlist functionality - Library structure with nested folders - AUV3 plug-in support - IAA with audio hosts - Switchable color schemes - Spectrum editor/video export - Save MIDI soundfiles as MP3 - More SoundBanks - Tempo control - Transpose option - Custom SoundFont support - Local storage/in-app folder - Background play - Option to play once (no loop) ## Newest reviews (15 of 76) ### 4/5 — Could be a 5 star if… *2026-04-25* The biggest missing feature for me is adjusting the volumes of individual tracks, otherwise it can be a 5-star app. Other nice-to-have features could be zoom in/out and selecting a region to play. ### 2/5 — Needs to be fixed *2025-12-30, version 4.2.3* Whenever I click on another SoundFont, it just kicks me out of the app. ### 4/5 — Best MIDI file player on iOS, but… *2025-12-11, version 4.2.3* 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. ### 3/5 — iOS 26 Bug *2025-09-27, version 4.2.3* Great app, but there is a bug with iOS 26 where whenever I change SoundFonts, it crashes. PLEASE fix this! ### 3/5 — Bug with iOS 26 *2025-09-17, version 4.2.3* It’s a great app. Worked well, until iOS 26 came. Now every time I switch a SoundFont, it crashes. Please fix this. ### 3/5 — It’s pretty good but *2025-09-15, version 4.2.3* Updating to iOS 26 broke the sound font change ### 4/5 — Midi Opener - Review *2024-10-27, version 4.2.3* 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! ### 4/5 — Good App, just needs some changes *2024-10-18, version 4.2.3* It’s a pretty good app, loads up Soundfonts just fine, but there’s 3 things that would make it better 1. Individual instrumental volume level: a setting where you can adjust the volume of one single instrument. 2. Exporting the song: it would be great if you have an option to export the song to any sound format, like WAV or MP3 or FLAC or etc. 3. App Design: it would be amazing if you can switch the color scheme for the app, like a green color or black, it would be awesome. I definitely love this app, and would recommend to add those 3 features! ### 4/5 — Great app, but can I export an edit to my files *2023-11-07, version 4.2.3* How can we export tweaked files? ### 4/5 — Great app for playing midis but one suggestion, *2023-08-17, version 4.2.3* May you please add a spectrum editor for all the instruments or just the song in video form that we can save into our devices? Basically a spectrum video editor. If you do, Thanks alot. ### 3/5 — Good but take notes *2023-05-13, version 4.2* This is a good midi application with open support to multiple types of soundfonts FM or not my only issue is that you are charging for features that you can commonly find for free on desktop applications. ### 3/5 — Crashed after one play *2023-04-24, version 4.1* After I downloaded the app and uploaded one of my personal midi files, it played well. However, it does not load the app anymore. It's a shame because I was hoping to use this to audition my compositions for any changes I might make before publication. Even after restarting my ip14pro 512, no luck. ### 4/5 — good app but… *2023-04-15, version 4.1* 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! ### 5/5 — Terrific! *2023-04-11, version 4.0* This was a useful app before but the new upgrade is terrific. When our MD sends a midi file now I can select my instrument and mute others, add the rhythm sections, vary the BPM until I’ve got the hand of my part. Congratulations! ### 5/5 — This is great *2023-04-10, version 4.0* Just a great app. Nice UI and features. ## Most critical reviews (10 lowest-rated) ### 1/5 — What happened? *2026-07-08, version 5.6* This app was my goto midi app until this recent update. Sustained notes are being treated as staccato notes. It sounds bad and I will look for a new midi player in the meantime. ### 1/5 — Cuts off the beginning of the song *2026-05-18, version 5.1* I have used this app for years to learn hymns. Since the upgrade it cuts off the file at the beginning and starts it doesn’t start at the beginning. ### 1/5 — Defeating the purpose of sequenced music *2026-05-07, version 4.3* Charging people to mute separate tracks defeats the purpose of sequenced music ### 1/5 — I want a refund *2025-05-11, version 4.2.3* This is just pure hot flaming garbage and I can’t believe I paid you guys ### 1/5 — Pay for everything *2023-06-24, version 4.2.3* Unfortunately like many apps this app requires you to pay to use your own midi files, you can’t change the instrument type without buying features, even then they’re limited, they also don’t play the actual instrument associated with your midi file. 10/10 do not recommend sadly. ### 1/5 — Crashes at startup *2023-04-04, version 4.0* Too bad because this app looks perfect for my needs. ### 1/5 — Don’t bother. *2021-08-19, version 2.0* Tried opening the files directly via link on a website and also tried downloading close to a dozen different midi files and this program didn’t make a peep. ### 1/5 — Unable to play multitrack MIDI *2021-03-19, version 2.0* I tried this app to play a multitrack MIDI for my choir practise but it seems it’s randomly playing a single track only. Shame... :( ### 1/5 — Doesn't play *2017-06-20, version 1.4.1* I have it configured to play files from Google Drive, but I can't open any of the .mid files. ### 1/5 — Does not work *2017-03-03, version 1.3.1* Google Drive method does not work ## Most praised reviews (10 highest-rated) ### 5/5 — So nice an app, so responsive the developer! *2026-05-15, version 5.0* I gave a feedback a couple weeks ago, and wished the app can support adjusting the volumes of individual tracks. You know what? The feature is now added! ### 5/5 — Best easy midi player *2025-12-29, version 4.2.3* Definitely the beat i have used to just play quality midi files. Good sounding instruments. Set reverb to medium gall ir large gall and keep setting in the middle. Free trual, easy to learn how to use. ### 5/5 — 4.5 / 5 *2025-12-22, version 4.2.3* Great app, handles instrument changes on the fly better than most desktop apps. Would be perfect if it had export features and a playlist. ### 5/5 — Listening Piano *2024-06-14, version 4.2.3* Please Update The App it’s Been 1 year ### 5/5 — Excellent *2023-11-08* I have downloaded this app so I can play all of my midi files. I tried to upload a sound font, but I couldn’t find where you go to upload one. After searching for a minute or so, I found where you upload sound fonts. I downloaded the Super Mario 64 sound font just because it’s a good sound font. I found a midi of “Whatever It Takes” by Imagine Dragons and with the Super Mario 64 sound font, it sounded… …strangely beautiful. I downloaded some more midi files to test out what sounds good with the Super Mario 64 sound font, but I will still keep all of the midis even if they sound bad. ### 5/5 — I love the app, but i have an idea that could make it better! *2023-05-18, version 4.2.1* I love this app, i love taking midi files and hearing how it sounds in other soundfonts, but something i wish was in the app was an option to save midi soundfiles as mp3 files, since recording them to share them can be difficult. I still love this app, and that's why i rate it 5 stars even without the download function. ### 5/5 — The best for iOS (issue) *2023-05-08, version 4.2* Adding off of the old review for some reason when Ioad a soundfont the app crashes but the thing is the file is not corrupt I have used it many times before I don’t know why ### 5/5 — Excellent! *2023-05-04, version 4.1* I’ve been using this app for a while and the most recent updates are out of this world! The ability to change instruments and mute certain tracks is great to experiment with, and it doesn’t cost me my first born to unlock all the goodies! P.S. I forgot I had Rick Astley queued up previously so after the update I thought the devs were Rick-rolling me lol ### 5/5 — New update makes a great app greater! *2023-04-16, version 4.1* Love it! If you are on the fence on downloading this, then don’t worry. This is by far the best midi playback app I have seen. ### 5/5 — I guess it’s just what I needed *2023-04-12, version 3.4* I needed something to… open midi files and listen to them. Kudos to the creator! --- *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 2026-08-12.*