MIDI Wrench

Name: MIDI Wrench
Rating: 4.6 (69 reviews)
Author: Christian Schoenebeck d/b/a Crudebyte

By: Christian Schoenebeck d/b/a Crudebyte

MIDI Monitor & MIDI Controller

Features & Capabilities

MIDI Wrench is the Swiss Army Knife for your daily MIDI tasks on iOS. Connect MIDI keyboards, sound expanders, or any CoreMIDI device using Apple adapters, and even Bluetooth LE MIDI. Visualize incoming MIDI events in real time, view all attached CoreMIDI devices and virtual ports, and diagnose MIDI setups quickly.

Send Note On/Off and Control Change messages via the virtual keyboard and on-screen controls, which automatically reflect device values. Fully configurable on-screen controls, event filtering, one-tap copy to clipboard, and a privacy-first, ad-free experience. Works with both hardware and software MIDI sources, with no data collection.

User Growth & Download Statistics

App Music & Audio Developer Tools Privacy & Security

By:

Christian Schoenebeck d/b/a Crudebyte

Rating:

4.60

(69)

Version:

1.4 Last updated: 2020-05-05

Version code:

823646564

Creation date:

2013-01-11

Compatible devices:

Size:

21.44MB

URLs:

Website ,Privacy policy

Full description:

Source:

Apple Apps Store

Data ingested on:

2026-06-11

Compare stats and ranking:

Ranking

# 172,549 ▼ 102

For Developers

Monetize with App Pass Boost with Extension Booster

Contact the developer

Chrome-Stats does not own this Apple app. Please use these information below to contact the Apple app developer.

Developed by:

Christian Schoenebeck d/b/a Crudebyte

Apple Apps Store

https://apps.apple.com/us/app/midi-wrench/id589243566

Website:

https://crudebyte.com/mobile/midi_wrench/

User Reviews

MIDI Wrench is praised as a fast, lightweight, free MIDI diagnostic tool that shows real-time MIDI messages across diverse I/O and networks, helping users troubleshoot data flow and CC values. Reviewers love its simple UI and reliability for testing across devices. Major drawbacks are lack of audio output, occasional connection drops, and a desire for more features (patchbay, routing, ranges). Some note maintenance/compatibility expectations. Overall, it excels as a practical debugging aid for iPad-based MIDI workflows.

Pros

Excellent real-time MIDI data visibility for troubleshooting across multiple I/O setups (USB, Bluetooth, Wi‑Fi, virtual MIDI) and networks.
Lightweight, fast, and simple to use with a clean interface and readable numeric readouts.
Useful as a cross-device MIDI monitor that helps verify MIDI flow, CC values, and routing behavior.
Includes practical latency/monitoring capabilities (echo feature) for testing timing.
Free to use, making it an accessible diagnostic tool.

Cons

No built-in audio output; no sound from the piano keys, which makes testing audio paths harder.
Occasional connection drops or background wake issues requiring relaunch.
Feature set is limited; users want more (MIDI patchbay, key ranges/scales, USB/network MIDI out).
Perceived maintenance concerns and compatibility updates for newer iOS versions.
Primarily oriented toward iPad MIDI workflows, with limited use for other setups.

Recent reviews

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.

by Tr*****, 2026-03-08

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! 💔