# Sirens' Chor vs RasterFX

The clearest difference is price: RasterFX at Free against Sirens' Chor's $3.99. RasterFX also leads on rating (5.0 vs 4.0). Sirens' Chor's advantage is in-app purchases (none vs 1) and iOS requirement (10.0 vs 17.0). On ratings volume, ads and device support there is nothing between them.

RasterFX is free to download; Sirens' Chor costs $3.99 up front. RasterFX sells 1 one-off in-app purchase. Sirens' Chor asks for nothing beyond the download.

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

## The numbers

| Metric | Sirens' Chor | RasterFX |
| --- | --- | --- |
| Price | $3.99 | **Free** |
| 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/rasterfx-multi-effects/id6800385735/reviews)** |
| Number of ratings | **2** | 1 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 39 months | — |
| Monetization | Paid | — |
| Size | 11 MB | 5 MB |
| Requires iOS | **10.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Aleksandar Mlazev](https://appshunter.io/developer/1093798140) | [Chih Han Lin](https://appshunter.io/developer/1800248325) |

## 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


### RasterFX

[App page](https://appshunter.io/ios/app/rasterfx-multi-effects/id6800385735)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| RasterFX Pro | $3.99 | one-time |


## Frequently asked questions

### Is Sirens' Chor free?

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

### Is RasterFX free?

RasterFX is free to download, with in-app purchases available.

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

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

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

Neither Sirens' Chor nor RasterFX shows ads.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*