# Audio Toolbox vs Sirens' Chor

The clearest difference is rating: Audio Toolbox at 5.0 against Sirens' Chor's 4.0. Audio Toolbox also leads on update cadence (every 8 months vs every 39 months) and ratings volume (7 vs 2). Sirens' Chor's advantage is iOS requirement (10.0 vs 13). On price, review sentiment, ads and in-app purchases there is nothing between them.

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

Audio Toolbox holds the better App Store score, 5.0 against 4.0. Both are backed by a comparable volume of ratings — 7 and 2 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

Audio Toolbox ships an update every 8 months, Sirens' Chor every 39 months. The most recent releases landed on October 3, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | Audio Toolbox | Sirens' Chor |
| --- | --- | --- |
| Price | $3.99 | $3.99 |
| Rating | **[5.0 (7 ratings)](https://appshunter.io/ios/app/audio-toolbox/id1353387223/reviews)** | [4.0 (2 ratings)](https://appshunter.io/ios/app/sirens-chor-synth-chorus/id1497361812/reviews) |
| Number of ratings | **7** | 2 |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 8 months** | Every 39 months |
| Monetization | Paid | Paid |
| Size | 3 MB | 11 MB |
| Requires iOS | 13 | **10.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [4Pockets.com](https://appshunter.io/developer/370131860) | [Aleksandar Mlazev](https://appshunter.io/developer/1093798140) |

## What reviewers say

### Audio Toolbox

[App page](https://appshunter.io/ios/app/audio-toolbox/id1353387223)

This app provides a comprehensive suite of audio analysis tools, including a tone generator, oscilloscope, and FFT analysis engine. It allows users to create and analyze various waveforms, detect frequencies, and tune instruments with high accuracy.

**Highlights:** Tone Generator (20Hz-22KHz), Multiple Waveform Options, Fast Fourier Analysis, Audio Oscilloscope, Frequency and Note Detection, SPL Meter with LEQ, CSV Data Export

**Features:** macOS Compatibility

**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 Audio Toolbox free?

Audio Toolbox costs $3.99, with no in-app purchases.

### Is Sirens' Chor free?

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

### Which has better reviews, Audio Toolbox or Sirens' Chor?

Audio Toolbox is rated higher. Audio Toolbox averages 5.0 out of 5 from 7 ratings, while Sirens' Chor averages 4.0 from 2 ratings.

### Do Audio Toolbox or Sirens' Chor have ads?

Neither Audio Toolbox nor Sirens' Chor shows ads.

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

Audio Toolbox ships an update every 8 months, and Sirens' Chor every 39 months. Most recently, Audio Toolbox was updated on October 3, 2026 and Sirens' Chor on October 6, 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.*