# Spectre vs FET Acoustic Compressor

The clearest difference is review sentiment: FET Acoustic Compressor at 100% against Spectre's 40%. FET Acoustic Compressor also leads on rating (5.0 vs 3.0) and update cadence (every 2 months vs every 96 months). Spectre's advantage is price ($0.99 vs $5.99). On ratings volume, ads, in-app purchases and monetization model there is nothing between them.

Spectre costs $0.99 and FET Acoustic Compressor $5.99 up front. Neither carries in-app purchases, so what you see is what you pay.

FET Acoustic Compressor holds the better App Store score, 5.0 against 3.0. Both are backed by a comparable volume of ratings — 2 and 2 respectively. Written reviews point the same way: 40% of Spectre's written reviews are positive against 100% of FET Acoustic Compressor's.

Spectre ships an update every 96 months, FET Acoustic Compressor every 2 months. The most recent releases landed on November 4, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Spectre | FET Acoustic Compressor |
| --- | --- | --- |
| Price | **$0.99** | $5.99 |
| Rating | [3.0 (2 ratings)](https://appshunter.io/ios/app/spectre/id913027939/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/fet-acoustic-compressor/id6763790891/reviews)** |
| Number of ratings | 2 | 2 |
| Positive reviews | 40.0% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 96 months | **Every 2 months** |
| Monetization | Paid | Paid |
| Size | 46 MB | 9 MB |
| Requires iOS | **12.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Michael Hand](https://appshunter.io/developer/854186096) | [Shelbybark LLC](https://appshunter.io/developer/1895490257) |

## What reviewers say

### Spectre

[App page](https://appshunter.io/ios/app/spectre/id913027939)

This audio analysis utility provides real-time FFT and oscilloscope views for sound input. Customize waveform display, control sample rates, and zoom in for detailed analysis on iOS devices.

**Highlights:** FFT Analysis, Oscilloscope, Customizable Waveform, Linear & Logarithmic Forms, Pause/Play Controls, Zoom Functionality

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

**In-app purchases:** none


### 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


## Frequently asked questions

### Is Spectre free?

Spectre costs $0.99, with no in-app purchases.

### Is FET Acoustic Compressor free?

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

### Which has better reviews, Spectre or FET Acoustic Compressor?

FET Acoustic Compressor is rated higher. Spectre averages 3.0 out of 5 from 2 ratings, while FET Acoustic Compressor averages 5.0 from 2 ratings.

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

Neither Spectre nor FET Acoustic Compressor shows ads.

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

Spectre ships an update every 96 months, and FET Acoustic Compressor every 2 months. Most recently, Spectre was updated on November 4, 2026 and FET Acoustic Compressor 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.*