# FET Acoustic Compressor vs Retromulator

The clearest difference is review sentiment: FET Acoustic Compressor at 100% against Retromulator's 50%. FET Acoustic Compressor also leads on price ($5.99 vs $19.99) and iOS requirement (13.0 vs 15.0). Retromulator's advantage is update cadence (every 3 days vs every 2 months) and chart position (#189 vs unranked). On ads, in-app purchases, monetization model and device support there is nothing between them.

FET Acoustic Compressor costs $5.99 and Retromulator $19.99 up front. Neither carries in-app purchases, so what you see is what you pay.

FET Acoustic Compressor ships an update every 2 months, Retromulator every 3 days. The most recent releases landed on October 22, 2026 and October 18, 2026 respectively.

## The numbers

| Metric | FET Acoustic Compressor | Retromulator |
| --- | --- | --- |
| Price | **$5.99** | $19.99 |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/fet-acoustic-compressor/id6763790891/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | **100.0% of reviews** | 50.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 3 days** |
| Monetization | Paid | Paid |
| Best chart rank | — | **#189** |
| Size | 9 MB | 83 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Shelbybark LLC](https://appshunter.io/developer/1895490257) | [DiscoDSP LLC](https://appshunter.io/developer/1465262828) |

## What reviewers say

### FET Acoustic Compressor

[App page](https://appshunter.io/ios/app/fet-acoustic-compressor/id6763790891)

This app emulates the warm, musical character of classic FET compressors for acoustic instruments and more. It offers intuitive controls for punch, presence, and glue, with a special "All-In" mode for aggressive sounds. Designed for mobile studios and live performance.

**Highlights:** Classic FET compression emulation, Voiced for acoustic guitar, versatile for other instruments, Intuitive controls: IN, ATTACK, RELEASE, RATIO, OUT, DRY, SC HPF, Special "All-In" mode for aggressive sounds, AUv3 plugin support for popular DAWs, Low latency for live performance, Factory presets included

**In-app purchases:** none


### Retromulator

[App page](https://appshunter.io/ios/app/retromulator/id6764767449)

**Currently charting:** #189 Top Paid · Music (US App Store)

This app recreates legendary vintage synthesizers, samplers, and keyboards through accurate emulation. It functions as a standalone application or an AUv3 plugin, offering classic electronic music hardware sounds on iOS devices.

**Highlights:** Cycle-accurate hardware emulation, AUv3 plugin support, Standalone app functionality, Full MIDI control, ROM firmware loading, Background audio support

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

**In-app purchases:** none


## Frequently asked questions

### Is FET Acoustic Compressor free?

FET Acoustic Compressor costs $5.99, with no in-app purchases.

### Is Retromulator free?

Retromulator costs $19.99, with no in-app purchases.

### Do FET Acoustic Compressor or Retromulator have ads?

Neither FET Acoustic Compressor nor Retromulator shows ads.

### Which is updated more often, FET Acoustic Compressor or Retromulator?

FET Acoustic Compressor ships an update every 2 months, and Retromulator every 3 days. Most recently, FET Acoustic Compressor was updated on October 22, 2026 and Retromulator on October 18, 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.*