# Sirens' Chor vs RedNova

The clearest difference is rating: RedNova at 5.0 against Sirens' Chor's 4.0. RedNova also leads on update cadence (every 4 weeks vs every 39 months). Sirens' Chor's advantage is price ($3.99 vs $9.99) and iOS requirement (10.0 vs 12.0). On ratings volume, ads, in-app purchases and monetization model there is nothing between them.

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

RedNova holds the better App Store score, 5.0 against 4.0. Both are backed by a comparable volume of ratings — 2 and 1 respectively.

Sirens' Chor ships an update every 39 months, RedNova every 4 weeks. The most recent releases landed on November 7, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Sirens' Chor | RedNova |
| --- | --- | --- |
| Price | **$3.99** | $9.99 |
| Rating | [4.0 (2 ratings)](https://appshunter.io/ios/app/sirens-chor-synth-chorus/id1497361812/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/rednova-spatial-compressor/id6749191303/reviews)** |
| Number of ratings | **2** | 1 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 39 months | **Every 4 weeks** |
| Monetization | Paid | Paid |
| Size | 11 MB | 17 MB |
| Requires iOS | **10.0** | 12.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Aleksandar Mlazev](https://appshunter.io/developer/1093798140) | [Simon Alexander](https://appshunter.io/developer/1789202493) |

## What reviewers say

### 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

**Features:** Vision Pro support

**In-app purchases:** none


### RedNova

[App page](https://appshunter.io/ios/app/rednova-spatial-compressor/id6749191303)

This audio plugin offers intelligent compression and spatial positioning for professional sound design. It adapts to your audio, allowing you to control dynamics and place sounds forward for presence or back for warmth. Transform recordings into spatially positioned compositions with intuitive controls.

**Highlights:** Intelligent adaptive compression, VCA compressor with analog saturation, Forward/back spatial positioning, Visual position orb feedback, Advanced sidechain control, AUv3 plugin format

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Sirens' Chor free?

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

### Is RedNova free?

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

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

RedNova is rated higher. Sirens' Chor averages 4.0 out of 5 from 2 ratings, while RedNova averages 5.0 from 1 ratings.

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

Neither Sirens' Chor nor RedNova shows ads.

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

Sirens' Chor ships an update every 39 months, and RedNova every 4 weeks. Most recently, Sirens' Chor was updated on November 7, 2026 and RedNova on October 30, 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.*