# Sirens' Chor vs ERS_DimD

The clearest difference is price: Sirens' Chor at $3.99 against ERS_DimD's $9.99. ERS_DimD's advantage is update cadence (every 8 months vs every 39 months). On rating, review sentiment, ratings volume and ads there is nothing between them.

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

On the App Store both sit at effectively the same score — 4.0 for Sirens' Chor against 4.0 for ERS_DimD. Both are backed by a comparable volume of ratings — 2 and 5 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

Sirens' Chor ships an update every 39 months, ERS_DimD every 8 months. Both last shipped on November 3, 2026.

## The numbers

| Metric | Sirens' Chor | ERS_DimD |
| --- | --- | --- |
| Price | **$3.99** | $9.99 |
| Rating | [4.0 (2 ratings)](https://appshunter.io/ios/app/sirens-chor-synth-chorus/id1497361812/reviews) | [4.0 (5 ratings)](https://appshunter.io/ios/app/ers-dimd/id1584371989/reviews) |
| Number of ratings | 2 | **5** |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 39 months | **Every 8 months** |
| Monetization | Paid | Paid |
| Size | 11 MB | 7 MB |
| Requires iOS | 10.0 | **9.3** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Aleksandar Mlazev](https://appshunter.io/developer/1093798140) | [Christian Siedschlag](https://appshunter.io/developer/538434682) |

## 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


### ERS_DimD

[App page](https://appshunter.io/ios/app/ers-dimd/id1584371989)

This audio plugin emulates the classic Roland Dimension D chorus effect, known for its subtle, airy stereo enhancement. It adds presence to sounds without compromising the original audio structure. Enhanced controls offer more flexibility than the original hardware.

**Highlights:** Emulates Roland Dimension D chorus, Subtle stereoizing effect, Adds presence and airiness, Enhanced control options, Preserves original sound structure

**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 ERS_DimD free?

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

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

Sirens' Chor and ERS_DimD are both rated 4.0 out of 5 on the App Store, from 2 and 5 ratings respectively.

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

Neither Sirens' Chor nor ERS_DimD shows ads.

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

Sirens' Chor ships an update every 39 months, and ERS_DimD every 8 months. Most recently, Sirens' Chor was updated on November 3, 2026 and ERS_DimD on November 3, 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.*