# mfxMonitor vs GSDSP MMM

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.

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

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.

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.

## The numbers

| Metric | mfxMonitor | GSDSP MMM |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.0 (4 ratings)](https://appshunter.io/ios/app/mfxmonitor/id1451193551/reviews) | **[4.7 (35 ratings)](https://appshunter.io/ios/app/gsdsp-mmm/id6443846329/reviews)** |
| Number of ratings | 4 | **35** |
| Positive reviews | 50.0% of reviews | **66.7% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 5 weeks** |
| Monetization | Free | Free |
| Size | 2 MB | 65 MB |
| Requires iOS | **9.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Audeonic Apps](https://appshunter.io/developer/351607509) | [Gustav Scholda](https://appshunter.io/developer/1642323227) |

## What reviewers say

### mfxMonitor

[App page](https://appshunter.io/ios/app/mfxmonitor/id1451193551)

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:** Vision Pro support

**In-app purchases:** none


### GSDSP MMM

[App page](https://appshunter.io/ios/app/gsdsp-mmm/id6443846329)

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:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked 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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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*