Comparison

mfxMonitor vs GSDSP MMM

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

mfxMonitor

This utility displays incoming MIDI events in both text and hex format with timestamps. It offers a clear button to reset the event log and is part of a series of powerful MIDI plugins for music production.

Highlights
  • MIDI event display
  • Textual and hex format
  • Timestamped events
  • Clear event log
  • AUv3 compatible
  • CoreMIDI compatible
Features
Read full description

* MIDI MONITOR * (AUv3 or CoreMIDI Effect) Does the World need another MIDI Monitor? We thought so, and it's free, so you have nothing to lose to add this handy little utility to your app collection. Any MIDI events received by the plugin are displayed in a scrolling window in both textual form and also the lower level hex bytes with timestamps. Once you get sick of the events you can press the 'clear' button to wipe them out of your life forever. * ABOUT mfxSeries * mfxSeries is a set of compact but powerful plugins for CoreMIDI or AUv3 hosts. Covering a range of use cases from common everyday MIDI manipulation tasks to creatively ambitious effects. Each plugin in the mfxSeries can be controlled and automated from the host as all controls are exposed as AUv3 parameters. mfxSeries plugins are built using the MidiBus library - http://midib.us

About

GSDSP MMM

This app offers a robust MIDI modulation engine for controlling various instruments and plugins. It allows users to create dynamic audio with LFOs, random sources, and more, featuring a performance-focused interface for live use.

Highlights
  • MIDI CC control for plugins and hardware
  • LFOs, random sources, and envelope followers
  • Audio-based modulation capabilities
  • Dedicated Performance Skin for live use
  • AUv3 audio effect plugin
  • Desktop versions for Windows and macOS
Features
Read full description

A powerful MIDI modulation engine for controlling plugins, hardware, and instruments using LFOs, random sources, macros, and audio-based modulation. Modulate Everything MMM is a MIDI controller and modulation workstation designed to control any parameter that accepts MIDI CC — software instruments, plugins, external hardware, or any MIDI-capable device. Create modulation using LFOs, Random Generators, Envelope Followers, XY pads, and more. No more drawing of automation curves, keep your audio dynamic and exciting with ease. Perform Live MMM includes a dedicated Performance Skin designed for low-light and stage environments. It uses a restrained, red-accented color palette that preserves focus and minimizes visual distraction while performing. The interface remains clear and readable in dark settings, ensuring stable workflow during your live performance. MMM vs MMMm MMM includes audio input, enabling Envelope Followers, audio-reactive modulation, and audio output — ideal when used as an audio plugin. MMMm, by contrast, is a MIDI-only FX version for hosts such as Logic Pro or AUM that require a pure MIDI processor. Both versions support MIDI input and output and provide the same core modulators. MMM is an AUv3 audio effect plugin compatible with Logic Pro, AUM, Cubasis, GarageBand and many more. A Desktop version is also available for Windows and macOS (VST3 / AU / AAX). More information here: https://gs-dsp.com/products So what are you waiting for?

Screenshots

mfxMonitor1 screens
GSDSP MMM4 screens

Verdict

The call

The clearest difference is rating: GSDSP MMM at 4.7 against mfxMonitor's 4.0. GSDSP MMM also leads on review sentiment (67% vs 50%) and ratings volume (35 vs 4). mfxMonitor's advantage is iOS requirement (9.0 vs 13.0). On price, update cadence, ads and in-app purchases there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

GSDSP MMM holds the better App Store score, 4.7 against 4.0. That said, the two scores are not equally well evidenced: GSDSP MMM has 35 ratings behind it against 4, so its average is the more settled of the two. Written reviews point the same way: 50% of mfxMonitor's written reviews are positive against 67% of GSDSP MMM's.

UpkeepUpdate frequency

mfxMonitor ships an update every 2 months, GSDSP MMM every 5 weeks. The most recent releases landed on October 9, 2026 and October 25, 2026 respectively.

Scorecard4 real differences · 6 level
mfxMonitor versus GSDSP MMM: the parameters behind the verdict, then further details
ParametermfxMonitorGSDSP MMM
PriceFreeFree
Rating4.0 (4 ratings)4.7 (35 ratings) — better
Positive reviews50.0% of reviews66.7% of reviews — better
Number of ratings435 — better
Update frequencyEvery 2 monthsEvery 5 weeks — better
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS9.0 — better13.0
Further details — not scored
Size2 MB65 MB
Age rating4+4+
DeveloperAudeonic AppsGustav Scholda

Customer experience

mfxMonitor

All ratings4 ratings
Positive75.0%
Neutral0.0%
Negative25.0%
Written reviews2 reviews
Positive50.0%
Neutral0.0%
Negative50.0%

GSDSP MMM

All ratings36 ratings
Positive94.4%
Neutral0.0%
Negative5.6%
Written reviews6 reviews
Positive66.7%
Neutral0.0%
Negative33.3%

In-app purchases

None

mfxMonitor

No in-app purchases

None

GSDSP MMM

No in-app purchases

Questions

Is mfxMonitor free?
mfxMonitor is free to download, with no in-app purchases.
Is GSDSP MMM free?
GSDSP MMM is free to download, with no in-app purchases.
Which has better reviews, mfxMonitor or GSDSP MMM?
GSDSP MMM is rated higher. mfxMonitor averages 4.0 out of 5 from 4 ratings, while GSDSP MMM averages 4.7 from 35 ratings.
Do mfxMonitor or GSDSP MMM have ads?
Neither mfxMonitor nor GSDSP MMM shows ads.
Which is updated more often, mfxMonitor or GSDSP MMM?
mfxMonitor ships an update every 2 months, and GSDSP MMM every 5 weeks. Most recently, mfxMonitor was updated on October 9, 2026 and GSDSP MMM on October 25, 2026.

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