# GSDSP MMM vs Chord Roulette

The clearest difference is price: GSDSP MMM at Free against Chord Roulette's $0.99. GSDSP MMM also leads on rating (4.7 vs 4.4) and iOS requirement (13.0 vs 15.6). Chord Roulette's advantage is update cadence (every 3 days vs every 5 weeks). On review sentiment, ratings volume, ads and in-app purchases there is nothing between them.

GSDSP MMM is free to download; Chord Roulette costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

GSDSP MMM holds the better App Store score, 4.7 against 4.4. Both are backed by a comparable volume of ratings — 36 and 23 respectively. Written reviews complicate that: 67% of GSDSP MMM's written reviews are positive against 71% of Chord Roulette's, so the app with the better star average is not the one people write more warmly about.

GSDSP MMM ships an update every 5 weeks, Chord Roulette every 3 days. The most recent releases landed on October 27, 2026 and October 21, 2026 respectively.

## The numbers

| Metric | GSDSP MMM | Chord Roulette |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| Rating | **[4.7 (36 ratings)](https://appshunter.io/ios/app/gsdsp-mmm/id6443846329/reviews)** | [4.4 (23 ratings)](https://appshunter.io/ios/app/chord-roulette/id6470079737/reviews) |
| Number of ratings | **36** | 23 |
| Positive reviews | 66.7% of reviews | **71.4% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Every 3 days** |
| Monetization | **Free** | Paid |
| Size | 65 MB | 3 MB |
| Requires iOS | **13.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Gustav Scholda](https://appshunter.io/developer/1642323227) | [Denis Safiullin](https://appshunter.io/developer/1840438643) |

## What reviewers say

### 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


### Chord Roulette

[App page](https://appshunter.io/ios/app/chord-roulette/id6470079737)

This AUv3 MIDI plugin transforms a single MIDI note into a wide range of harmonious chords, enabling generative music composition. It offers extensive control over parameters, scales, and real-time adjustments for creative musical exploration.

**Highlights:** Chord generation from single MIDI notes, Automation-ready parameters, Generative music composition, Diverse scale and mode selection, Real-time precision adjustments, AUv3 compatibility for DAWs

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is GSDSP MMM free?

GSDSP MMM is free to download, with no in-app purchases.

### Is Chord Roulette free?

Chord Roulette costs $0.99, with no in-app purchases.

### Which has better reviews, GSDSP MMM or Chord Roulette?

GSDSP MMM is rated higher. GSDSP MMM averages 4.7 out of 5 from 36 ratings, while Chord Roulette averages 4.4 from 23 ratings.

### Do GSDSP MMM or Chord Roulette have ads?

Neither GSDSP MMM nor Chord Roulette shows ads.

### Which is updated more often, GSDSP MMM or Chord Roulette?

GSDSP MMM ships an update every 5 weeks, and Chord Roulette every 3 days. Most recently, GSDSP MMM was updated on October 27, 2026 and Chord Roulette on October 21, 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.*