# Knob On — Touch controls for VCV Rack

> Touch controls for VCV Rack (iPhone/iPad app by Zui Chen.)

- Source: https://appshunter.io/ios/app/knob-on/id6824089549 (this page in markdown: same URL + `.md`)
- Developer: [Zui Chen](https://appshunter.io/developer/1884859534)
- Category: Music, Utilities
- Price: Free
- Age rating: 4+
- Requires: iOS 17.0 · 1 MB
- Languages: American English
- Released: 2026-10-27
- Data updated: 2026-10-27

## What is Knob On?

Your Rack. Within reach.

Knob On turns your iPhone or iPad into a touch surface for VCV Rack on your Mac. Map a control to a Rack parameter, then turn or slide it from your screen. Changes made in Rack come back to the app.

YOUR TOUCH SURFACE
[x] Eight dials on iPhone, or twelve on iPad.
[x] Four sliders on both devices.
[x] Hold a control to learn a target knob or slider in Rack.
[x] See the mapped parameter name and its current value.
[x] Choose labels, colors, and minimum and maximum touch ranges.
[x] Use Fine mode to make dials and sliders adjust 10× more slowly.

CONNECT TO YOUR PATCH
[x] Find nearby Rack instances on your local network.
[x] Match the name shown on the Knob On Bridge module—no IP lookup needed.
[x] Get two-way feedback while keeping your current touch gesture in control.
[x] Save mappings in your Rack patch and keep your layout settings in the app.
[x] Reconnect automatically when the connection returns.

BEFORE YOU START
Requires VCV Rack 2.6.6 or later and Knob On Bridge 2.3.1 on a Mac with Apple silicon, on the same local network as your iPhone or iPad. Install the companion Rack module using the setup instructions on the support page.

Knob On controls Rack parameters. Audio runs in Rack on your Mac. Most standard bounded knobs and sliders can be mapped; internal CV modulation may affect the sound without changing the displayed parameter value.

## Is Knob On safe?

Not enough ratings yet to assess Knob On.

## Is Knob On legit?

Knob On has limited verification signals. The AppsHunter Legitimacy Score for Knob On is 58 out of 100 points across 7 verification signals from App Store and developer data.


## Version history (last 1 release)

### 1.0.0 — 2026-10-27

No release notes.

## More apps by Zui Chen

- [Melo - Words from AI Chats](https://appshunter.io/ios/app/melo-words-from-ai-chats/id6760539346)

All apps by Zui Chen: https://appshunter.io/developer/1884859534

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-10-27.*