# NightShine AUv3 Compressor vs SL Knock

The clearest difference is update cadence: SL Knock at weekly against NightShine AUv3 Compressor's every 3 months. NightShine AUv3 Compressor's advantage is price ($4.99 vs $6.99). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

NightShine AUv3 Compressor costs $4.99 and SL Knock $6.99 up front. Neither carries in-app purchases, so what you see is what you pay.

NightShine AUv3 Compressor ships an update every 3 months, SL Knock weekly. The most recent releases landed on October 30, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | NightShine AUv3 Compressor | SL Knock |
| --- | --- | --- |
| Price | **$4.99** | $6.99 |
| Rating | **[3.3 (3 ratings)](https://appshunter.io/ios/app/nightshine-auv3-compressor/id6746288283/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Weekly** |
| Monetization | Paid | — |
| Size | 14 MB | 28 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [DiscoDSP LLC](https://appshunter.io/developer/1465262828) | [VIACHESLAV ZHILTSOV](https://appshunter.io/developer/1862005860) |

## What reviewers say

### NightShine AUv3 Compressor

[App page](https://appshunter.io/ios/app/nightshine-auv3-compressor/id6746288283)

This professional audio effect emulates the classic Alesis 3630 hardware compressor. It offers authentic analog modeling with advanced oversampling for pristine sound quality and musical compression. Features include dual detection modes, variable knee processing, and precise control over dynamics.

**Highlights:** Alesis 3630 hardware emulation, 16x oversampling for pristine audio, Dual Peak/RMS detection modes, Advanced knee processing with variable width, Authentic analog-style waveshaping, Brickwall limiter and auto makeup gain, 16 professional presets

**Features:** macOS Compatibility

**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 NightShine AUv3 Compressor free?

NightShine AUv3 Compressor costs $4.99, with no in-app purchases.

### Is SL Knock free?

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

### Do NightShine AUv3 Compressor or SL Knock have ads?

Neither NightShine AUv3 Compressor nor SL Knock shows ads.

### Which is updated more often, NightShine AUv3 Compressor or SL Knock?

NightShine AUv3 Compressor ships an update every 3 months, and SL Knock weekly. Most recently, NightShine AUv3 Compressor 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.*