# NYCompressor vs Sirens' Chor

The clearest difference is review sentiment: Sirens' Chor at 100% against NYCompressor's 50%. Sirens' Chor also leads on price ($3.99 vs $9.99) and rating (4.0 vs 3.8). NYCompressor's advantage is update cadence (every 6 months vs every 39 months) and ratings volume (15 vs 2). On ads, in-app purchases, monetization model and device support there is nothing between them.

NYCompressor costs $9.99 and Sirens' Chor $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Sirens' Chor holds the better App Store score, 4.0 against 3.8. That said, the two scores are not equally well evidenced: NYCompressor has 15 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 50% of NYCompressor's written reviews are positive against 100% of Sirens' Chor's.

NYCompressor ships an update every 6 months, Sirens' Chor every 39 months. The most recent releases landed on September 21, 2026 and June 21, 2026 respectively.

## The numbers

| Metric | NYCompressor | Sirens' Chor |
| --- | --- | --- |
| Price | $9.99 | **$3.99** |
| Rating | [3.8 (15 ratings)](https://appshunter.io/ios/app/nycompressor/id1241268066/reviews) | **[4.0 (2 ratings)](https://appshunter.io/ios/app/sirens-chor-synth-chorus/id1497361812/reviews)** |
| Number of ratings | **15** | 2 |
| Positive reviews | 50.0% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 6 months** | Every 39 months |
| Monetization | Paid | Paid |
| Size | 17 MB | 11 MB |
| Requires iOS | **9.3** | 10.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Christian Siedschlag](https://appshunter.io/developer/538434682) | [Aleksandar Mlazev](https://appshunter.io/developer/1093798140) |

## What reviewers say

### NYCompressor

[App page](https://appshunter.io/ios/app/nycompressor/id1241268066)

A professional audio compressor plugin for iOS devices, offering versatile dynamics management for music production. It supports various hosts and provides features like sidechaining and parallel compression for achieving desired mix effects.

**Highlights:** Compression ratio up to 1:10, Optional key signal filtering, True sidechaining, Hard/soft knee, Parallel (New York) compression, Independent L/R or Mid/Side compression

**Features:** Vision Pro support

**In-app purchases:** none


### Sirens' Chor

[App page](https://appshunter.io/ios/app/sirens-chor-synth-chorus/id1497361812)

This experimental audio effect app analyzes input audio to generate a secondary harmonic voice using sine wave oscillators. The generated voice can be mixed with the original or played solo, creating a chorus effect. It's CPU intensive and operates within a specific frequency range.

**Highlights:** Harmonic analysis of input audio, Sine wave oscillator synthesis, Adjustable chorus effect, Second voice generation, AUV3 plugin support

**In-app purchases:** none


## Frequently asked questions

### Is NYCompressor free?

NYCompressor costs $9.99, with no in-app purchases.

### Is Sirens' Chor free?

Sirens' Chor costs $3.99, with no in-app purchases.

### Which has better reviews, NYCompressor or Sirens' Chor?

Sirens' Chor is rated higher. NYCompressor averages 3.8 out of 5 from 15 ratings, while Sirens' Chor averages 4.0 from 2 ratings.

### Do NYCompressor or Sirens' Chor have ads?

Neither NYCompressor nor Sirens' Chor shows ads.

### Which is updated more often, NYCompressor or Sirens' Chor?

NYCompressor ships an update every 6 months, and Sirens' Chor every 39 months. Most recently, NYCompressor was updated on September 21, 2026 and Sirens' Chor on June 21, 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.*