# MIDIWriter vs FET Acoustic Compressor

The clearest difference is review sentiment: FET Acoustic Compressor at 100% against MIDIWriter's 0%. FET Acoustic Compressor also leads on rating (5.0 vs 1.5) and update cadence (every 2 months vs every 35 months). MIDIWriter's advantage is price ($0.99 vs $5.99). On ratings volume, ads, in-app purchases and monetization model there is nothing between them.

MIDIWriter 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 1.5. Both are backed by a comparable volume of ratings — 2 and 2 respectively. Written reviews point the same way: 0% of MIDIWriter's written reviews are positive against 100% of FET Acoustic Compressor's.

MIDIWriter ships an update every 35 months, FET Acoustic Compressor every 2 months. The most recent releases landed on November 1, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | MIDIWriter | FET Acoustic Compressor |
| --- | --- | --- |
| Price | **$0.99** | $5.99 |
| Rating | [1.5 (2 ratings)](https://appshunter.io/ios/app/midiwriter/id520751563/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/fet-acoustic-compressor/id6763790891/reviews)** |
| Number of ratings | 2 | 2 |
| Positive reviews | 0.0% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 35 months | **Every 2 months** |
| Monetization | Paid | Paid |
| Size | 31 MB | 9 MB |
| Requires iOS | 16.0 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Masayuki Akamatsu](https://appshunter.io/developer/284722836) | [Shelbybark LLC](https://appshunter.io/developer/1895490257) |

## What reviewers say

### MIDIWriter

[App page](https://appshunter.io/ios/app/midiwriter/id520751563)

This app transforms keyboard input into musical notes and sounds. Type characters to instantly generate MIDI messages, or input phrases to create musical sequences with adjustable tempo and looping. It includes a built-in sound engine and supports external MIDI devices and apps.

**Highlights:** Text to MIDI conversion, Built-in General MIDI sound engine, Phrase playback with tempo control, Drum mode with multiple kits, External MIDI output, Hardware keyboard support, Wi-Fi MIDI networking

**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 MIDIWriter free?

MIDIWriter 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, MIDIWriter or FET Acoustic Compressor?

FET Acoustic Compressor is rated higher. MIDIWriter averages 1.5 out of 5 from 2 ratings, while FET Acoustic Compressor averages 5.0 from 2 ratings.

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

Neither MIDIWriter nor FET Acoustic Compressor shows ads.

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

MIDIWriter ships an update every 35 months, and FET Acoustic Compressor every 2 months. Most recently, MIDIWriter was updated on November 1, 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.*