# DirectionalEQ vs Sirens' Chor

The clearest difference is review sentiment: Sirens' Chor at 100% against DirectionalEQ's 33%. Sirens' Chor also leads on price ($3.99 vs $9.99) and rating (4.0 vs 3.6). DirectionalEQ's advantage is ratings volume (14 vs 2) and update cadence (every 19 months vs every 39 months). On ads, in-app purchases, monetization model and device support there is nothing between them.

DirectionalEQ 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 3.6. That said, the two scores are not equally well evidenced: DirectionalEQ has 14 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 33% of DirectionalEQ's written reviews are positive against 100% of Sirens' Chor's.

DirectionalEQ ships an update every 19 months, Sirens' Chor every 39 months. Both last shipped on October 24, 2026.

## The numbers

| Metric | DirectionalEQ | Sirens' Chor |
| --- | --- | --- |
| Price | $9.99 | **$3.99** |
| Rating | [3.6 (14 ratings)](https://appshunter.io/ios/app/directionaleq/id1301365260/reviews) | **[4.0 (2 ratings)](https://appshunter.io/ios/app/sirens-chor-synth-chorus/id1497361812/reviews)** |
| Number of ratings | **14** | 2 |
| Positive reviews | 33.3% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 19 months** | Every 39 months |
| Monetization | Paid | Paid |
| Size | 11 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

### DirectionalEQ

[App page](https://appshunter.io/ios/app/directionaleq/id1301365260)

This audio plugin allows independent equalization of different directions within the stereo field. It offers five bands with advanced filter types, enabling precise adjustments to specific audio directions for a more nuanced sound. Designed for use within compatible music production host apps.

**Highlights:** Independent equalization of stereo field directions, Five bands with state-of-the-art filter types, 64-bit processing and 2x oversampling, Specify direction for each band's operation, Works as an Audio Unit or Inter App Audio plugin

**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

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is DirectionalEQ free?

DirectionalEQ 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, DirectionalEQ or Sirens' Chor?

Sirens' Chor is rated higher. DirectionalEQ averages 3.6 out of 5 from 14 ratings, while Sirens' Chor averages 4.0 from 2 ratings.

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

Neither DirectionalEQ nor Sirens' Chor shows ads.

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

DirectionalEQ ships an update every 19 months, and Sirens' Chor every 39 months. Most recently, DirectionalEQ was updated on October 24, 2026 and Sirens' Chor on October 24, 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.*