# MIDI Wrench — user reviews > 54 indexed App Store user reviews of MIDI Wrench by Christian Schoenebeck d/b/a Crudebyte, rated 4.60/5 from 71 ratings. - Source: https://appshunter.io/ios/app/midi-wrench/id589243566/reviews - App overview in markdown: https://appshunter.io/ios/app/midi-wrench/id589243566.md - Rating breakdown: 5★ 59 · 4★ 6 · 3★ 2 · 2★ 1 · 1★ 3 ## Newest reviews (14 of 54) ### 5/5 — This app is really is important to have. *2023-02-10* I recently bought a new midi keyboard controller to use with Cubasis3 on iPad, but no matter how much I tried I could not the midi learn parameters to work at all, so I launched Midi Wrench to check what was going on and instantly everything started to work as it should without me changing any settings, I can’t believe this incredible app is free! I am going to rate it ⭐️⭐️⭐️⭐️⭐️⭐️⭐️⭐️⭐️⭐️ 1 YEAR AGO I have managed to sort out all kind of Midi problems thanks to Midi Wrench. I would seriously recommend that all midi users have this important Midi monitor, just launch it and leave it running in the back round until you need it. Very important if you want to check what midi data is being transmitted or received. ### 5/5 — Great app. Great potential *2023-01-09* Is it possible to add options like (1) change the range of keys and (2) set the keys to different scales. It will be nice to control a vst on the desktop from the GarageBand with this app or similar set as an auv3 instrument. I am trying to use an iPad as a midi controller for the vst on a pc using Bluetooth midi. Thanks for creating a great simple app but maybe additional options can be sold as in app purchase. ### 5/5 — Solid! *2022-10-26, version 1.4* Good tool for the toolbox. ### 5/5 — Great free tool! *2022-10-25* This is exactly the tool I needed to diagnose the problems I’ve been having getting MIDI data transmitting properly between my iPad Pro and my Windows computer over rtpMIDI. Thanks so much! ### 5/5 — it’s an oscilloscope for MIDI, and works. *2022-09-27* Autumn 2022 - My modulation wheel was playing up on my Launchkey Mk2 61 MIDI controller keyboard, it was not going right down to zero. Sat at around 6 or 7 or 10 or so. I did the Novation reset method (hit certain keys while powering on) and that made no difference at all. When MIDI wrench was up though, displaying the stream of numbers output on screen of my iPad, I could meddle with the Mod wheel, and watch the numbers…this proved that I COULD get down to zero on the mod wheel, if it was rotated downward but lifting up the middle with a little bit of force. In other words, this is a mechanical limit of movement, not an electronics calibration problem. I know now, I am going to ferret around in the keyboard, and move a stop-screw or something. If the device would recalibrate, it would probably work - but there’s no advice on how that can be done by users. So, thanks for this utility helping me chase the issue down. OLDER - still 5 stars, different use is all: I had a very focused reason and simple question: can I grab MIDI out of GarageBand iOS? Spoiler, no seems the answer. Other apps were claimed to be able to do this, by being Audio Units and so forth, but using MIDIwrench I did tests, and proved not a thing except clock signals and a ‘stop’ comes out of GB iOS. And having the app other people say worked, made no difference. MIDIwrench is set onto an app, and watches it, for MIDI output, and you make the app send MIDI to MIDIwrench, to see if the ‘conduit’ works. In my case, it’s all inside the iPad, so it’s a virtual conduit, but I see others have real cables they check. Thank you Christian. ### 5/5 — Must Have *2022-07-27* If you use midi on iOS then this is a very handy tool ### 5/5 — Wow, what an elegant midi monitor/controller *2022-01-20* Everything is quick, lightweight. Looks like 4 midi controller ‘knobs’ which (normally I hate on screens but) each knob graphic expands to full screen & it feels so smooth like butter… I dunno, if something goes wrong I’ll change my rating but off the bat, this is like “wow what a nice tool” & it’s free? Thanks so much ### 5/5 — Livesaver! *2021-11-02* I was just about returning my new iRig Blueboard as the IK App did not work with Ultimate Guitars. With MIDI Wrench the connection worked immediately! Thank you so much Walter ### 5/5 — As folk have said, it just works! *2021-11-01* Yes, it works, and it’s easy. Such a blessing after struggling for ages to connect BlueBoard to Ultimate Guitar. Thank you so much for this super app! ### 5/5 — works great to detect midi would love sound *2021-08-30* sound would help with testing. i see signls but hear nothing. ### 5/5 — Best MIDI Tool. *2021-01-01, version 1.4* My go to midi app. Just work ### 5/5 — I love this app! *2020-09-05* Fantastic app for troubleshooting and connecting midi devices with iOS. I use it daily. ### 5/5 — Excellent App *2020-08-19* Does everything advertised. An excellent app. ### 5/5 — Thanks! *2020-04-25, version 1.3.7* Thanks for the functionality of this app! My initial purpose is to determine why my iPad apps are suddenly not playing notes sent from my controller: the interface flashes note activity and the DAW recognizes the interface; the synths play via their onscreen keyboards. What the?? Your app instantly and easily showed me my interface and displayed the stream of [Note On] data I was hoping to see!! Haven’t solved the mystery yet, but this important diagnostic step accomplished courtesy of your offering. Looking forward to using this app to troubleshoot my rig and better understand the magic of midi! Thanks again. ## Most critical reviews (10 lowest-rated) ### 1/5 — LISTEN UP, IT PLAYS NO SOUND I REPEAT NO SOUND AT ALL!!! 🤬🤬🤬🤬🤬🤬🤬😡😡😡😡😡😡 *2025-08-13* It's a bummer that the MIDI wrench had no sound. I tried so hard to get it working, but it just wouldn't cooperate. Seriously, take my advice and skip this nonsense! 💔 ### 1/5 — Needs MIDI out capabilities *2019-12-26* Only useful for iPad synth musicians. I want to MIDI out over USB or network. Don’t really care which, just make it happen and you’ve got a 5 star app. ### 3/5 — Good App *2025-06-14, version 1.4* Good app but you can’t import .mid files. Otherwise, it does its job. ### 3/5 — Hard to play as keys are small *2021-10-27* Could not find a way to increase the size of keys. It will be very useful if less but large keys are available with sliding possibility. ### 3/5 — Midi Maps *2019-08-11* Klasse kann jetzt Note setzen Üben ,bekomme mal mit was es heißt Controller Midi Maps zu belegen.... ### 3/5 — Nicht richtig überzeugend *2014-12-03* Swiss Army knife? Wo die App noch nicht mal eine Auswahl des MIDI I/Os bietet? Der einzige Grund sie zu nutzen ist, dass es so gut wie nichts anderes im Shop mehr gibt. Seit gefühlt 2008 hat niemand es mehr für nötig befunden, mal eine richtig geile, vollständige und umfassende MIDI App zu programmieren. Alles nur furchtbar aussehende, Funktions-mässig halbgare, und schon gar nicht auf iOS 7 oder 8 basierende Anfängerversuche. Da muss man dann das benutzen was übrig bleibt - dies hier... ### 4/5 — WONDERFUL monitor of MIDI I/O *2023-07-02* This app is so fantastic at what it does that I wish it was designed to do just a tad more because then it could really be the MIDI ‘Swiss army knife’ so to speak, not just a “wrench.” If you use your iOS device with any MIDI I/O especially multiple types simultaneously like hardware MIDI I/O via USB or bluetooth/Wi-Fi MIDI, virtual MIDI, various apps simultaneously that use MIDI this app is incredibly valuable because when something isn’t behaving the way you’re expect, getting to see in realtime line-by-line each MIDI command you can quickly figure out what’s actually going on and adjust that to meet goals. There’s a a few knobs (4) which have plenty of versatility in that you can configure them to any MIDI channel or CC desired , its a bit weird to me to see just a bit of that type of functionality - but in a way it makes total sense and I wouldnt’ wish them gone. I was hoping maybe it could work as a MIDI patchbay - it has this one feature which will “echo” all inputs to outputs but it says that’s meant for measuring latency (very cool) but it would only work for MIDI routing in the very specific cases. Great free app. ### 4/5 — Midi Tastatur zu klein *2022-06-23* Alles super, aber die Midi Tastatur müsste grösser oder in der Größe einstellbar sei um etwas einzuspielen. ### 4/5 — Does what I need *2017-05-30* I am using several midi compatible apps on my iPad. Each time I come back to my piano to do something, the first thing I do is power up my piano, turn on Bluetooth on my iPad, and open MIDI Wrench to reset the iPad connection with my piano's MD-BT01 Bluetooth adapter. It works every time. I do see that this app does a lot more, but I don't need any feature other than making the connection. The only reason I am not giving this five stars is because, if I take a break (20-30 minutes?) without turning off either my Piano or my iPad (and my iPad is set to never auto-lock), I sometimes discover my connection has been disconnected. Then I have to reopen this app (still running in background) and reconnect. As long as this app is still running in the background, it should wake up often enough to keep that connection alive. ### 4/5 — Ok app *2016-02-09, version 1.2.6* Very few features ## Most praised reviews (10 highest-rated) ### 5/5 — Nice little app *2026-03-08* Nice app, does exactly what it advertises. If I could magically make additional features appear, it would be the option to display the raw midi message in their hexadecimal form, and an option to manually construct and send midi messages, both in raw hex form and in a simplified version. Those would help with troubleshooting difficult equipment. ### 5/5 — Excellent app! *2025-03-17* Thank you for making this app, it’s super helpful to have when trying to figure out issues with MIDI! ### 5/5 — Brilliant *2024-10-30* Needed to check midi ouput on my kawai piano . Flawless ### 5/5 — Miracle cure *2024-09-06* Just downloaded this app to help me connect Yamaha MdBT01 MIDI device via Bluetooth, a quick click on the MIDI Devices Bluetooth MIDI tab and up it pops, click on connect, job done. Meanwhile my IPAD is still searching I find the Bluetooth on iPads always a problem. All resolved now Thanks to the team ### 5/5 — Essential app for midi instruments *2024-05-12* Nothing MIDI would work before I used this app. It’s free, maintained and collects no data - absolutely brilliant. ### 5/5 — Great! *2023-12-29* Saved me hours! Badly documented Midi devices is quite common. This app lets you check all commands and functionality quick ans easy! Thanks! ### 5/5 — Hey *2023-12-25* Hey there is no audio when pressing the piano keys Can you please fix it ### 5/5 — Very good but i can not clear screen just pause *2023-10-23* Hi Why clear screen don t appears ? Overwise this app is essentiel for me ### 5/5 — Great MIDI Tool. Thank you! *2023-07-18* Sometimes just opening this tool can resolve MIDI connections. If you use MIDI, you should keep this app handy. Anytime I have MIDI connection problems or I want to know what data is being sent and from where—this is the tool I use. You can stop and restart MIDI message flow and lots more with this tool. If MIDI activity is a mystery to you, this is the tool that reveals what’s going on “under the hood.” ### 5/5 — Simple: It Works *2023-07-02* It simply does what it’s supposed to do. Not a bunch of junk needed like some other apps. THANK YOU! --- *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 2026-08-19.*