# Knob Lab vs MIDI FX

The clearest difference is rating: MIDI FX at 5.0 against Knob Lab's 4.3. MIDI FX also leads on update cadence (every 9 days vs every 4 months) and monetization model (free vs free with in-app purchases). On price, ratings volume, ads and in-app purchases there is nothing between them.

Both are free to download. Knob Lab sells 4 one-off in-app purchases and MIDI FX sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

MIDI FX holds the better App Store score, 5.0 against 4.3. Both are backed by a comparable volume of ratings — 12 and 5 respectively.

Knob Lab ships an update every 4 months, MIDI FX every 9 days. The most recent releases landed on October 24, 2026 and October 23, 2026 respectively.

## The numbers

| Metric | Knob Lab | MIDI FX |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.3 (12 ratings)](https://appshunter.io/ios/app/knob-lab/id727466234/reviews) | **[5.0 (5 ratings)](https://appshunter.io/ios/app/midi-fx/id1641511918/reviews)** |
| Number of ratings | **12** | 5 |
| Positive reviews | 84.6% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 9 days** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 66 MB | 263 MB |
| Requires iOS | 15.0 | **14.7** |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Uri Nachmias](https://appshunter.io/developer/316332139) | [Jorge Arroyo](https://appshunter.io/developer/548989572) |

## 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 |


### MIDI FX

[App page](https://appshunter.io/ios/app/midi-fx/id1641511918)

This app allows you to control and process MIDI signals for music creation. It offers features like harmonization, transposition, and sequencing, enabling you to control external or virtual synthesizers and create complex musical arrangements.

**Highlights:** MIDI signal processing, Harmonize and Transpose, Sequencer for synths, Delay and Looper, Filter notes by velocity, Internal instruments

**Features:** Family Sharing

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock app | $9.99 | one-time |


## Frequently asked questions

### Is Knob Lab free?

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

### Is MIDI FX free?

MIDI FX is free to download, with in-app purchases available.

### Which has better reviews, Knob Lab or MIDI FX?

MIDI FX is rated higher. Knob Lab averages 4.3 out of 5 from 12 ratings, while MIDI FX averages 5.0 from 5 ratings.

### Do Knob Lab or MIDI FX have ads?

Neither Knob Lab nor MIDI FX shows ads.

### Which is updated more often, Knob Lab or MIDI FX?

Knob Lab ships an update every 4 months, and MIDI FX every 9 days. Most recently, Knob Lab was updated on October 24, 2026 and MIDI FX on October 23, 2026.

---

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