# AU EngineCore vs 4Comp

The clearest difference is price: 4Comp at $4.99 against AU EngineCore's $22.99. On update cadence, ads, in-app purchases and device support there is nothing between them.

AU EngineCore costs $22.99 and 4Comp $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Both ship on a similar rhythm, roughly weekly. The most recent releases landed on October 8, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | AU EngineCore | 4Comp |
| --- | --- | --- |
| Price | $22.99 | **$4.99** |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/4comp-auv3-compressor-plugin/id6805205834/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Weekly | Weekly |
| Monetization | — | Paid |
| Size | 13 MB | 3 MB |
| Requires iOS | 16.6 | **16.0** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Antonio Sorin TASU](https://appshunter.io/developer/1883473854) | [NATHAN THOMAS MATHIS](https://appshunter.io/developer/1870347850) |

## What reviewers say

### AU EngineCore

[App page](https://appshunter.io/ios/app/au-enginecore/id6766300671)

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

**In-app purchases:** none


### 4Comp

[App page](https://appshunter.io/ios/app/4comp-auv3-compressor-plugin/id6805205834)

This audio plugin offers four distinct analog-style compressor models (FET, VCA, Optical, Vari-Mu), each with its own sound and interface. It provides advanced features like stereo linking, sidechain filtering, and real-time transfer curve visualization.

**Highlights:** Four analog compressor models (FET, VCA, Optical, Vari-Mu), Unique DSP engine and interface for each model, Live transfer curve visualization, Stereo link and sidechain high-pass filter, Dry/wet mix and auto make-up gain, 17 presets included, 0-sample latency

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

**In-app purchases:** none


## Frequently asked questions

### Is AU EngineCore free?

AU EngineCore costs $22.99, with no in-app purchases.

### Is 4Comp free?

4Comp costs $4.99, with no in-app purchases.

### Do AU EngineCore or 4Comp have ads?

Neither AU EngineCore nor 4Comp shows ads.

### Which is updated more often, AU EngineCore or 4Comp?

AU EngineCore ships an update weekly, and 4Comp weekly. Most recently, AU EngineCore was updated on October 8, 2026 and 4Comp on October 16, 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.*