# Knob Lab vs GSDSP MMM

The clearest difference is in-app purchases: GSDSP MMM at none against Knob Lab's 4. GSDSP MMM also leads on rating (4.7 vs 4.3) and update cadence (every 5 weeks vs every 4 months). Knob Lab's advantage is review sentiment (85% vs 67%). On price, ads and device support there is nothing between them.

Both are free to download. Knob Lab sells 4 one-off in-app purchases. GSDSP MMM asks for nothing beyond the download.

GSDSP MMM holds the better App Store score, 4.7 against 4.3. Both are backed by a comparable volume of ratings — 12 and 36 respectively. Written reviews complicate that: 85% of Knob Lab's written reviews are positive against 67% of GSDSP MMM's, so the app with the better star average is not the one people write more warmly about.

Knob Lab ships an update every 4 months, GSDSP MMM every 5 weeks. The most recent releases landed on October 24, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | Knob Lab | GSDSP MMM |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.3 (12 ratings)](https://appshunter.io/ios/app/knob-lab/id727466234/reviews) | **[4.7 (36 ratings)](https://appshunter.io/ios/app/gsdsp-mmm/id6443846329/reviews)** |
| Number of ratings | 12 | **36** |
| Positive reviews | **84.6% of reviews** | 66.7% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 5 weeks** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 66 MB | 65 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Uri Nachmias](https://appshunter.io/developer/316332139) | [Gustav Scholda](https://appshunter.io/developer/1642323227) |

## What reviewers say

### Knob Lab

[App page](https://appshunter.io/ios/app/knob-lab/id727466234)

This application transforms your iOS device into a versatile MIDI controller. It allows you to manage various DAWs and music software remotely via USB, WiFi, or Bluetooth. Create intricate control setups with a single rotary knob, affecting multiple MIDI destinations simultaneously.

**Highlights:** Remote DAW control, USB, WiFi, Bluetooth connectivity, Virtual MIDI support, Audiobus integration, Complex control mapping, iPad support, MIDI logger

**Features:** Vision Pro support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Two Knob Layout | $0.99 | one-time |
| Four/Six Knob Layout | $0.99 | one-time |
| Nine/Twelve knob layout. | $0.99 | one-time |
| Unlock all layouts | $1.99 | one-time |


### 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 Knob Lab free?

Knob Lab is free to download, with in-app purchases available.

### Is GSDSP MMM free?

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

### Which has better reviews, Knob Lab or GSDSP MMM?

GSDSP MMM is rated higher. Knob Lab averages 4.3 out of 5 from 12 ratings, while GSDSP MMM averages 4.7 from 36 ratings.

### Do Knob Lab or GSDSP MMM have ads?

Neither Knob Lab nor GSDSP MMM shows ads.

### Which is updated more often, Knob Lab or GSDSP MMM?

Knob Lab ships an update every 4 months, and GSDSP MMM every 5 weeks. Most recently, Knob Lab was updated on October 24, 2026 and GSDSP MMM on October 27, 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.*