# Sirens' Chor vs VAPolyMT

The clearest difference is price: Sirens' Chor at $3.99 against VAPolyMT's $14.99. Sirens' Chor also leads on iOS requirement (10.0 vs 16.6). VAPolyMT's advantage is rating (5.0 vs 4.0) and update cadence (every 11 months vs every 39 months). On ratings volume, ads, in-app purchases and monetization model there is nothing between them.

Sirens' Chor costs $3.99 and VAPolyMT $14.99 up front. Neither carries in-app purchases, so what you see is what you pay.

VAPolyMT holds the better App Store score, 5.0 against 4.0. Both are backed by a comparable volume of ratings — 2 and 4 respectively.

Sirens' Chor ships an update every 39 months, VAPolyMT every 11 months. Both last shipped on October 24, 2026.

## The numbers

| Metric | Sirens' Chor | VAPolyMT |
| --- | --- | --- |
| Price | **$3.99** | $14.99 |
| Rating | [4.0 (2 ratings)](https://appshunter.io/ios/app/sirens-chor-synth-chorus/id1497361812/reviews) | **[5.0 (4 ratings)](https://appshunter.io/ios/app/vapolymt/id6743886961/reviews)** |
| Number of ratings | 2 | **4** |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 39 months | **Every 11 months** |
| Monetization | Paid | Paid |
| Size | 11 MB | 18 MB |
| Requires iOS | **10.0** | 16.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Age rating | 4+ | 4+ |
| Developer | [Aleksandar Mlazev](https://appshunter.io/developer/1093798140) | [Ryo Togawa](https://appshunter.io/developer/1474193056) |

## 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


### VAPolyMT

[App page](https://appshunter.io/ios/app/vapolymt/id6743886961)

This powerful synthesizer app offers bi-timbral polyphony with analog-style sequencers and assignable macro controls. It functions as a standalone application or an AudioUnit Extension, supporting MIDI, Ableton Link, and audio export. Project files are savable via iCloud Drive for cross-platform access.

**Highlights:** Bi-timbral polyphonic synthesizer, Analog-style step sequencer per timbre, Assignable macro controls, AudioUnit Extension (AUv3) support, Ableton Link and MIDI support, iCloud Drive project sharing, Built-in effects and piano roll editor

**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 VAPolyMT free?

VAPolyMT costs $14.99, with no in-app purchases.

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

VAPolyMT is rated higher. Sirens' Chor averages 4.0 out of 5 from 2 ratings, while VAPolyMT averages 5.0 from 4 ratings.

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

Neither Sirens' Chor nor VAPolyMT shows ads.

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

Sirens' Chor ships an update every 39 months, and VAPolyMT every 11 months. Most recently, Sirens' Chor was updated on October 24, 2026 and VAPolyMT 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.*