# ShowMIDI — Effortlessly visualize MIDI > Open-source GUI application to visualize MIDI activity in real-time. (iPhone/iPad app by Uwyn, LLC.) - Source: https://appshunter.io/ios/app/showmidi/id6472608850 (this page in markdown: same URL + `.md`) - Developer: [Uwyn, LLC](https://appshunter.io/developer/597132109) - Category: Music, Utilities - Price: Free - Rating: 4.80/5 from 18 App Store ratings · 8 written reviews indexed - Age rating: 4+ - Requires: iOS 12.0 · 8 MB - Languages: American English - Released: 2023-11-20 - Data updated: 2026-08-14 - Monetization: free - User reviews in markdown: https://appshunter.io/ios/app/showmidi/id6472608850/reviews.md ## What is ShowMIDI? ShowMIDI is an open-source multi-platform GUI application to effortlessly visualize MIDI activity. Instead of wading through logs of MIDI messages to correlate relevant ones and identify what is happening, ShowMIDI visualizes the current activity and auto-hides what you don't care about anymore. It provides you with a real-time glanceable view of all MIDI activity on your computer. ShowMIDI is designed to be always on, using the spacebar or play/pause button you can pause the flow and focus on a data snapshot with the latest state of any MIDI entity. ShowMIDI can be ran as a standalone application that automatically detects all your MIDI devices, or as an AUv3 plugin in your DAW or host to visualize MIDI data in your sessions. ShowMIDI visualizes: * MIDI ports * channels * program change * note on/off * channel pressure * polyphonic pressure * continuous control change * pitchbend * RPN and NRPN * MPE configuration and channel modes ShowMIDI supports: * themes * standalone operation * AUv3 operation ## Key features - Real-time MIDI visualization - Auto-hides irrelevant messages - Pause and snapshot data - Standalone application - AUv3 plugin support - Supports MPE configuration ## Recent user reviews (8 of 8) All indexed reviews: https://appshunter.io/ios/app/showmidi/id6472608850/reviews.md ### 5/5 — Very Awesome! *2026-02-28* This app was integral in the development of an app I wrote that involves MIDI keyboards. It is easy to use and is an essential tool to help diagnose MIDI issues. Highly recommend!!! ### 5/5 — Thank you 🙏🏼 *2025-07-25* Invaluable tool for tracking down issues. Was losing my mind because an app was only using MIDI note names and its note naming scheme was unconventional 😒 This utility allowed me to see the MIDI note numbers being used. ### 5/5 — Incredibly useful MIDI monitor *2024-01-08* Invaluable tool to keep an eye on MIDI events flying back and forth. 👍 ### 5/5 — Incontournable *2024-01-08* Une application incontournable et graphiquement superbe pour tout musicien utilisateur de midi externe et interne ### 5/5 — Super useful … *2024-01-08* And beautifully made. My favorite MIDI monitor. Big thanks Geert! ### 5/5 — YoMIDI!!!! *2024-01-08* the view you’ve been looking for. after you’ve seen your midi like this, you can’t go back. and you can taste all 5 stars, SRSly, eat them up, and its free ### 5/5 — Thank you!! This is SO useful! *2024-01-07* This is the best app ever that I never knew I needed. I use MIDI loggers all the time for troubleshooting and testing, but it’s such a pain sometimes to scroll through messages to find what you’re looking for. The screens also take up too much room on a crowded device screen. ShowMIDI elegantly takes care of both problems, saving time and energy. Logging is still needed in some cases, so my only suggestion is to perhaps add an optional panel for logging … off by default of course. ### 3/5 — Room for improvement *2023-11-21* When you press a key on the keyboard it shows briefly the key ON but it disappeared as soon as you release the key and the only data that gets registerded y the history is the Note OFF. Also if you repeatedly press the same key you only get one event registered, so there is no way of knowing how many times you pressed the key. This does not happen with other Midi Monitors..... **Developer response:** Bonanote52, before leaving a 3 star review on an application that you didn't pay anything for, please do some research to see if you might not be misunderstanding something or projecting your own expectations on something that is not designed to meet them. What you describe is exactly what makes ShowMIDI different, from the App Store description: "Instead of wading through logs of MIDI messages to correlate relevant ones and identify what is happening, ShowMIDI visualizes the current activity and auto-hides what you don't care about anymore. It provides you with a real-time glanceable view of all MIDI activity on your computer. ShowMIDI is designed to be always on, using the spacebar or play/pause button you can pause the flow and focus on a data snapshot with the latest state of any MIDI entity." If you want to wade through logs of MIDI messages, there's plenty of tools that do that, ShowMIDI offers a different approach for when you don't need that. This is why many websites have praised ShowMIDI's approach, like CDM: https://cdm.link/2023/11/showmidi-is-the-free-midi-visualization-utility-youve-been-waiting-for/ I would appreciate it if you would remove your review or adapt the star rating, what you did here is extremely bad form. It's very easy to contact me, you could just have asked a question instead: https://github.com/gbevin/ShowMIDI ## Frequently asked questions about ShowMIDI ### What kind of MIDI data does ShowMIDI visualize? ShowMIDI visualizes a comprehensive range of MIDI data, including ports, channels, program changes, note on/off events, channel and polyphonic pressure, continuous control changes, pitchbend, RPN/NRPN messages, and MPE configuration. ### Can I use ShowMIDI offline? Yes, ShowMIDI can be run as a standalone application that automatically detects your MIDI devices, allowing for offline use without needing a DAW. ### How does ShowMIDI help with complex MIDI sessions? Instead of sifting through raw logs, ShowMIDI provides a real-time, glanceable view of MIDI activity, automatically hiding messages you don't need to see, making it easier to understand what's happening. ### What platforms does ShowMIDI support? ShowMIDI is a multi-platform GUI application that supports iPhone, iPad, and iPod devices. ### How often is ShowMIDI updated? The latest version of ShowMIDI was released on July 10, 2024, indicating active development and regular updates. ### What is the age rating for ShowMIDI? ShowMIDI has an age rating of 4+, making it suitable for a wide range of users. ### Does ShowMIDI have ads? No, ShowMIDI is an open-source application and does not contain advertisements. ### What is the user sentiment for ShowMIDI? Users have rated ShowMIDI highly, with an average of 4.9 stars from 16 ratings, suggesting a very positive user experience. ## Version history (last 4 releases) ### 1.0.1 — 2024-07-10 * Added support for currently standardized RPNs 0-6 with human readable value display for each RPN's purpose. * Improved NRPN and RPN handling, using the Hi-Res 14-bit CC value logic for Data Entry and supporting setting the value with only the MSB. * Fixed HRCC history and graphs only using the MSB and not the LSB. ### 1.0.0 — 2024-07-08 * Improved channel order algorithm, now showing a channel at the top when it appears, keeping its order until it disappears. * Added support for displaying MIDI data as scrolling graphs with compact, medium and large height settings. * Added support for Hi-Res 14-bit MIDI Control Change messages. * Added support for MIDI clock displayed as BPM. * Added support for MIDI clock start, continue and stop. * Added ability to hide or show all devices by holding the alt /option key while toggle a device's visibility in the sidebar. * Added a reset button to clear all MIDI data. * Added 'never' as a timeout delay option. * Added keyboard shortcuts for toggling visualization style and MIDI data reset. * Added tooltips to sidebar buttons. * Various stability improvements. * Updated macOS App Icon to be the same size as other icons. * Updated CLAP JUCE extension. * Upgraded JUCE to 7.0.12. ### 0.9.0 — 2024-01-07 * Added support for sysex message display with up to 20 bytes of data preview * Improved layout of MIDI notes so that the note on message continues to be visible together with note off * Updated to JUCE 7.0.9 ### 0.8.0 — 2023-11-21 No release notes. ## Apps similar to ShowMIDI | App | Rating | Price | Category | | --- | --- | --- | --- | | [EG Nodes](https://appshunter.io/ios/app/eg-nodes/id6466639463) | 4.8 (91) | $19.99 | Music | | [Salome - MPE Audio Sampler](https://appshunter.io/ios/app/salome-mpe-audio-sampler/id6468663356) | 4.7 (30) | $7.99 | Music | | [Relic Waves](https://appshunter.io/ios/app/relic-waves/id6472637691) | 5.0 (42) | $1.99 | Music | | [GSDSP MMMm](https://appshunter.io/ios/app/gsdsp-mmmm/id6450306205) | 4.9 (14) | Free | Music | | [GSDSP MMM](https://appshunter.io/ios/app/gsdsp-mmm/id6443846329) | 4.8 (34) | Free | Music | | [Cantoria](https://appshunter.io/ios/app/cantoria/id6468679668) | 4.8 (23) | Free | Music | ## More apps by Uwyn, LLC - [MidiWrist](https://appshunter.io/ios/app/midiwrist/id1452355349) - [MIDI Tape Recorder](https://appshunter.io/ios/app/midi-tape-recorder/id1598618004) - [MidiWrist Unleashed](https://appshunter.io/ios/app/midiwrist-unleashed/id6479215445) All apps by Uwyn, LLC: https://appshunter.io/developer/597132109 ## Related topics [midi monitor](https://appshunter.io/ios/topics/midi-monitor) · [geoshred](https://appshunter.io/ios/topics/geoshred) --- *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 2026-08-14.*