NYCompressor vs Sirens' Chor
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
NYCompressor
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.
- 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
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A professional compressor plugin for iOS. Compatible with Garageband, Cubasis, AuriaPro and other AUv3 or Inter App Audio compatible hosts. The NYCompressor is the ideal workhorse when it comes to dynamics management in a mix. From gentle compression for glueing your mix together to heavy drum compression for the ultimate punch: NYCompressor can do it all. Features: – Compression ratio up to 1:10. – Optional key signal filtering. – True sidechaining (4 inputs, needs to be supported by host) – Hard/soft knee. – Parallel (New York) compression. – Independent L/R or Mid/Side compression. Planned, designed and lovingly handcrafted by DDMF, a renowned audio software company from Southern Germany.
Sirens' Chor
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.
- Harmonic analysis of input audio
- Sine wave oscillator synthesis
- Adjustable chorus effect
- Second voice generation
- AUV3 plugin support
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This one is quite experimental and CPU heavy app! While working on my Chord Detector app I came up with the idea to play the found harmonics with sine wave oscillators so I can hear what the algorithm is hearing :) It turns out to be an interesting output that led me to creation of this audio effect app. What happens here is that the input is analysed for main harmonics in the range of 80Hz to 1500Hz. Then a series of sine wave oscillators are set to play those harmonics with the exact frequency and volume and their output is added to create a second voice. This second voice can then be mixed with the input to create some kind of chorus or played alone. All this is CPU heavy process so it should be used with care... Also to make this effect possible I had to use limited range 80Hz to 1500Hz so it is not suitable for every instrument and you have to keep that range in mind when producing. Some very fast volume and frequency changes are applied to the oscillators. The app is AUV3
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | NYCompressor | Sirens' Chor |
|---|---|---|
| Price | $9.99 | $3.99 — better |
| Rating | 3.8 (15 ratings) | 4.0 (2 ratings) — better |
| Positive reviews | 50.0% of reviews | 100.0% of reviews — better |
| Number of ratings | 15 — better | 2 |
| Update frequency | Every 6 months — better | Every 39 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 9.3 — better | 10.0 |
| Further details — not scored | ||
| Size | 17 MB | 11 MB |
| Age rating | 4+ | 4+ |
| Developer | Christian Siedschlag | Aleksandar Mlazev |
Customer experience
NYCompressor
Sirens' Chor
In-app purchases
NYCompressor
No in-app purchases
Sirens' Chor
No in-app purchases
Questions
Is NYCompressor free?
Is Sirens' Chor free?
Which has better reviews, NYCompressor or Sirens' Chor?
Do NYCompressor or Sirens' Chor have ads?
Which is updated more often, NYCompressor or Sirens' Chor?
Other comparisons
