# GSDSP MagicFilter vs SL Knock

The clearest difference is price: SL Knock at $6.99 against GSDSP MagicFilter's $29.99. SL Knock also leads on update cadence (weekly vs every 6 weeks). GSDSP MagicFilter's advantage is iOS requirement (13.0 vs 15.0). On ads, in-app purchases and device support there is nothing between them.

GSDSP MagicFilter costs $29.99 and SL Knock $6.99 up front. Neither carries in-app purchases, so what you see is what you pay.

GSDSP MagicFilter ships an update every 6 weeks, SL Knock weekly. The most recent releases landed on October 30, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | GSDSP MagicFilter | SL Knock |
| --- | --- | --- |
| Price | $29.99 | **$6.99** |
| Rating | **[5.0 (4 ratings)](https://appshunter.io/ios/app/gsdsp-magicfilter/id6670615154/reviews)** | — |
| Number of ratings | **4** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Weekly** |
| Monetization | Paid | — |
| Size | 52 MB | 28 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Gustav Scholda](https://appshunter.io/developer/1642323227) | [VIACHESLAV ZHILTSOV](https://appshunter.io/developer/1862005860) |

## What reviewers say

### GSDSP MagicFilter

[App page](https://appshunter.io/ios/app/gsdsp-magicfilter/id6670615154)

This audio effect plugin allows for intricate, non-linear filter shaping and dynamic spectral transformations. Create unique soundscapes by designing custom filter curves and modulating them for subtle to extreme audio manipulation.

**Highlights:** Multi-curve spectral filtering, Independent filter amounts per frequency, Morph between four filter curves, Curve Modifier for shifting and inverting, Global cut/boost controls, Built-in lowpass and highpass filters, Wet/dry mix control

**Features:** Vision Pro support

**In-app purchases:** none


### SL Knock

[App page](https://appshunter.io/ios/app/sl-knock/id6797349065)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is GSDSP MagicFilter free?

GSDSP MagicFilter costs $29.99, with no in-app purchases.

### Is SL Knock free?

SL Knock costs $6.99, with no in-app purchases.

### Do GSDSP MagicFilter or SL Knock have ads?

Neither GSDSP MagicFilter nor SL Knock shows ads.

### Which is updated more often, GSDSP MagicFilter or SL Knock?

GSDSP MagicFilter ships an update every 6 weeks, and SL Knock weekly. Most recently, GSDSP MagicFilter was updated on October 30, 2026 and SL Knock on October 31, 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.*