# Sinusoid vs Sirens' Chor

The clearest difference is rating: Sinusoid at 4.9 against Sirens' Chor's 4.0. Sinusoid also leads on update cadence (every 3 months vs every 39 months) and ratings volume (13 vs 2). Sirens' Chor's advantage is review sentiment (100% vs 69%) and price ($3.99 vs $4.99). On ads, in-app purchases, monetization model and device support there is nothing between them.

Sinusoid costs $4.99 and Sirens' Chor $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Sinusoid holds the better App Store score, 4.9 against 4.0. That said, the two scores are not equally well evidenced: Sinusoid has 13 ratings behind it against 2, so its average is the more settled of the two. Written reviews complicate that: 69% of Sinusoid's written reviews are positive against 100% of Sirens' Chor's, so the app with the better star average is not the one people write more warmly about.

Sinusoid ships an update every 3 months, Sirens' Chor every 39 months. The most recent releases landed on November 1, 2026 and November 7, 2026 respectively.

## The numbers

| Metric | Sinusoid | Sirens' Chor |
| --- | --- | --- |
| Price | $4.99 | **$3.99** |
| Rating | **[4.9 (13 ratings)](https://appshunter.io/ios/app/sinusoid/id416624795/reviews)** | [4.0 (2 ratings)](https://appshunter.io/ios/app/sirens-chor-synth-chorus/id1497361812/reviews) |
| Number of ratings | **13** | 2 |
| Positive reviews | 68.8% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 39 months |
| Monetization | Paid | Paid |
| Size | 7 MB | 11 MB |
| Requires iOS | **9.0** | 10.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Erik Sigth](https://appshunter.io/developer/385275335) | [Aleksandar Mlazev](https://appshunter.io/developer/1093798140) |

## What reviewers say

### Sinusoid

[App page](https://appshunter.io/ios/app/sinusoid/id416624795)

Create music with a retro 8-bit inspired sound machine. Features 4 channels for tones and drums, with extensive sound sculpting options like filters, modulation, and effects. Export your creations and integrate with other music apps.

**Highlights:** 4 sound channels (3 tones, 1 drum/noise), Extensive audio parameters (envelope, vibrato, glide, filter), Ring modulation and FM synthesis, Arpeggiator, delay, and bit crusher effects, MIDI input and output support, Audiobus, IAA, and AUv3 integration, AIFF export and in-app music player

**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 Sinusoid free?

Sinusoid costs $4.99, with no in-app purchases.

### Is Sirens' Chor free?

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

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

Sinusoid is rated higher. Sinusoid averages 4.9 out of 5 from 13 ratings, while Sirens' Chor averages 4.0 from 2 ratings.

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

Neither Sinusoid nor Sirens' Chor shows ads.

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

Sinusoid ships an update every 3 months, and Sirens' Chor every 39 months. Most recently, Sinusoid was updated on November 1, 2026 and Sirens' Chor on November 7, 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.*