Sirens' Chor vs Timeless Reverb
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
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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
Timeless Reverb
Experience the rich, metallic resonance of classic plate reverb with advanced physical modeling. This app offers full control over size, material, and sensor positions, plus parallel or series spring reverb options for unique character. Sculpt lush textures with freeze and shimmer controls, ideal for modern producers and sound designers.
- Physically modeled plate reverb
- Adjustable size, material, and mic placement
- Parallel or series spring reverb
- Shimmer and freeze controls
- Frequency-dependent damping
- Preset manager
- MIDI Learn
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Love the sound of vintage plate reverb but don’t have the space — or the steel — to install one? We've got you covered. Our advanced physical modeling engine faithfully recreates the rich, metallic resonance of a classic plate, with full control over size, material, sensor and exciter positions, and damping behavior. Want more character? Run a spring reverb in parallel or series — a modern remake of our original Devil Spring, now streamlined for performance. And for modern producers, ambient creators, and sound designers: freeze and shimmer controls let you sculpt lush textures instantly. One reverb. Endless personality. Features - Physically modeled plate reverb with adjustable size, material, and mic placement - Frequency-dependent damping curve for natural-sounding decay - 38 handpicked spring reverb IRs — cleaned and studio-ready - Built-in shimmer and freeze controls for cinematic ambience - High-efficiency convolution engine optimized for low CPU usage - Preset manager to save, recall, and organize your favorite sounds - MIDI Learn for seamless control from your hardware - Automatic stereo/mono handling — perfect for tracks or the master bus - Dedicated tone shaping for both plate and spring reverbs
Screenshots
Verdict
The clearest difference is rating: Timeless Reverb at 5.0 against Sirens' Chor's 4.0. Sirens' Chor's advantage is price ($3.99 vs $8.99) and device support (3 vs 1). On ratings volume, ads, in-app purchases and monetization model 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
Sirens' Chor costs $3.99 and Timeless Reverb $8.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Timeless Reverb holds the better App Store score, 5.0 against 4.0. Both are backed by a comparable volume of ratings — 2 and 2 respectively.
| Parameter | Sirens' Chor | Timeless Reverb |
|---|---|---|
| Price | $3.99 — better | $8.99 |
| Rating | 4.0 (2 ratings) | 5.0 (2 ratings) — better |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 2 | 2 |
| Update frequency | Every 39 months | — |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Devices | iPhone, iPad, iPod — better | iPad |
| Requires iOS | 10.0 — better | 12.0 |
| Further details — not scored | ||
| Size | 11 MB | 98 MB |
| Age rating | 4+ | 4+ |
| Developer | Aleksandar Mlazev | Julien Faure |
Customer experience
Sirens' Chor
Timeless Reverb
In-app purchases
Sirens' Chor
No in-app purchases
Timeless Reverb
No in-app purchases
Questions
Is Sirens' Chor free?
Is Timeless Reverb free?
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