# KNOCK Clipper vs FrobulatorAU

The clearest difference is rating: FrobulatorAU at 5.0 against KNOCK Clipper's 4.3. FrobulatorAU also leads on monetization model (free vs paid) and update cadence (every 9 days vs every 34 months). KNOCK Clipper's advantage is iOS requirement (12.0 vs 17.0). On price, ratings volume, 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.

FrobulatorAU holds the better App Store score, 5.0 against 4.3. Both are backed by a comparable volume of ratings — 7 and 8 respectively.

KNOCK Clipper ships an update every 34 months, FrobulatorAU every 9 days. The most recent releases landed on October 24, 2026 and October 17, 2026 respectively.

## The numbers

| Metric | KNOCK Clipper | FrobulatorAU |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.3 (7 ratings)](https://appshunter.io/ios/app/knock-clipper/id1663468033/reviews) | **[5.0 (8 ratings)](https://appshunter.io/ios/app/frobulatorau/id6760205581/reviews)** |
| Number of ratings | 7 | **8** |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 34 months | **Every 9 days** |
| Monetization | Paid | **Free** |
| Size | 8 MB | 2 MB |
| Requires iOS | **12.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Plugins That Knock](https://appshunter.io/developer/1648092173) | [Matthew Caldwell](https://appshunter.io/developer/993500585) |

## What reviewers say

### KNOCK Clipper

[App page](https://appshunter.io/ios/app/knock-clipper/id1663468033)

This app offers a premium, adjustable hard and soft clipper effect for music production. It's inspired by the signature sound of a popular drum kit series, designed to shape the sonics of modern music.

**Highlights:** User adjustable hard clipper, User adjustable soft clipper, Premium quality audio effect, Inspired by signature drum kit sounds, Shapes modern music sonics

**Features:** Vision Pro support

**In-app purchases:** none


### FrobulatorAU

[App page](https://appshunter.io/ios/app/frobulatorau/id6760205581)

This audio effect plugin transforms sounds with spectral delay, adding unique character to music projects. It's a free and open-source tool designed for use in various audio applications, offering extensive creative possibilities.

**Highlights:** Spectral delay effect, AUv3 plugin, Use in GarageBand, AUM, and other DAWs, Multiple instances per project, Free and open-source, No ads or in-app purchases

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is KNOCK Clipper free?

KNOCK Clipper is free to download, with no in-app purchases.

### Is FrobulatorAU free?

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

### Which has better reviews, KNOCK Clipper or FrobulatorAU?

FrobulatorAU is rated higher. KNOCK Clipper averages 4.3 out of 5 from 7 ratings, while FrobulatorAU averages 5.0 from 8 ratings.

### Do KNOCK Clipper or FrobulatorAU have ads?

Neither KNOCK Clipper nor FrobulatorAU shows ads.

### Which is updated more often, KNOCK Clipper or FrobulatorAU?

KNOCK Clipper ships an update every 34 months, and FrobulatorAU every 9 days. Most recently, KNOCK Clipper was updated on October 24, 2026 and FrobulatorAU on October 17, 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.*