# NightShine AUv3 Compressor vs SL Echo

The clearest difference is rating: SL Echo at 5.0 against NightShine AUv3 Compressor's 3.3. SL Echo also leads on update cadence (weekly vs every 3 months). NightShine AUv3 Compressor's advantage is price ($4.99 vs $6.99) and ratings volume (3 vs 1). On ads, in-app purchases, monetization model and device support there is nothing between them.

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

SL Echo holds the better App Store score, 5.0 against 3.3. Both are backed by a comparable volume of ratings — 3 and 1 respectively.

NightShine AUv3 Compressor ships an update every 3 months, SL Echo weekly. The most recent releases landed on November 5, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | NightShine AUv3 Compressor | SL Echo |
| --- | --- | --- |
| Price | **$4.99** | $6.99 |
| Rating | [3.3 (3 ratings)](https://appshunter.io/ios/app/nightshine-auv3-compressor/id6746288283/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/sl-echo/id6797348934/reviews)** |
| Number of ratings | **3** | 1 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Weekly** |
| Monetization | Paid | Paid |
| Size | 14 MB | 18 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 Echo

[App page](https://appshunter.io/ios/app/sl-echo/id6797348934)

This audio effect app provides animated delay and space for musical decisions on iPad. Easily adjust time, feedback, and tone for various repeat styles, while maintaining a clear dry signal with stereo width and ducking. It supports AUv3 integration with popular music hosts.

**Highlights:** Animated delay and space effects, Adjustable time and feedback, Tone shaping controls, Stereo width and ducking, AUv3 support, Standalone preview mode, Factory and user presets

**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 Echo free?

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

### Which has better reviews, NightShine AUv3 Compressor or SL Echo?

SL Echo is rated higher. NightShine AUv3 Compressor averages 3.3 out of 5 from 3 ratings, while SL Echo averages 5.0 from 1 ratings.

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

Neither NightShine AUv3 Compressor nor SL Echo shows ads.

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

NightShine AUv3 Compressor ships an update every 3 months, and SL Echo weekly. Most recently, NightShine AUv3 Compressor was updated on November 5, 2026 and SL Echo 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.*