Sirens' Chor vs Sound
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Sirens' Chor
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.
- Harmonic analysis of input audio
- Sine wave oscillator synthesis
- Adjustable chorus effect
- Second voice generation
- AUV3 plugin support
Read full descriptionHide full description
This one is quite experimental and CPU heavy app! While working on my Chord Detector app I came up with the idea to play the found harmonics with sine wave oscillators so I can hear what the algorithm is hearing :) It turns out to be an interesting output that led me to creation of this audio effect app. What happens here is that the input is analysed for main harmonics in the range of 80Hz to 1500Hz. Then a series of sine wave oscillators are set to play those harmonics with the exact frequency and volume and their output is added to create a second voice. This second voice can then be mixed with the input to create some kind of chorus or played alone. All this is CPU heavy process so it should be used with care... Also to make this effect possible I had to use limited range 80Hz to 1500Hz so it is not suitable for every instrument and you have to keep that range in mind when producing. Some very fast volume and frequency changes are applied to the oscillators. The app is AUV3
Sound
This application helps you block out distracting noises using basic wired headphones. It's designed to improve focus and productivity without requiring expensive equipment.
- Noise cancellation
- Works with wired headphones
- Improves focus
- Affordable solution
Read full descriptionHide full description
Sound-Shield – Smarter Sound Control, Completely Free Take control of your audio like never before with Sound-Shield — the ultimate app designed to give you a cleaner, safer, and more personalized listening experience. Whether you're trying to block out distractions, protect your hearing, or just fine-tune your sound, Sound-Shield has you covered. Key Features: • Real-time sound filtering and control • Reduce unwanted or harsh audio instantly • Clean, simple interface built for speed and ease • Lightweight and optimized for performance Why Sound-Shield? Sound-Shield isn’t just another audio app — it’s your personal sound protection system. Whether you're gaming, studying, working, or just relaxing, you stay in control of what you hear. 100% Free No subscriptions. No hidden fees. Just download and use. Built for Everyone From casual users to power users, Sound-Shield is designed to enhance your experience without getting in your way. Download Sound-Shield today and experience sound your way.
Screenshots
Verdict
The clearest difference is price: Sound at Free against Sirens' Chor's $3.99. Sound also leads on rating (5.0 vs 4.0) and update cadence (every 2 months vs every 39 months). Sirens' Chor's advantage is iOS requirement (10.0 vs 15.1). On ratings volume, ads, in-app purchases and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Sound is free to download; Sirens' Chor costs $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Sound 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, Sound every 2 months. The most recent releases landed on October 24, 2026 and October 31, 2026 respectively.
| Parameter | Sirens' Chor | Sound |
|---|---|---|
| Price | $3.99 | Free — better |
| Rating | 4.0 (2 ratings) | 5.0 (4 ratings) — better |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 2 | 4 — better |
| Update frequency | Every 39 months | Every 2 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Free — better |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 10.0 — better | 15.1 |
| Further details — not scored | ||
| Size | 11 MB | 43 MB |
| Age rating | 4+ | 4+ |
| Developer | Aleksandar Mlazev | Thomas Soter |
Customer experience
Sirens' Chor
Sound
In-app purchases
Sirens' Chor
No in-app purchases
Sound
No in-app purchases









