Sirens' Chor vs MONSTR
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
MONSTR
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MONSTR from White Elephant Audio provides up to six bands of stereo width control to correct mix issues or use for creative effect. Compatible with AUv3 hosts. Also available (for free) on Windows, macOS, and Linux, as a VST3 and AudioUnit: https://www.whiteelephantaudio.com/plugins/monstr MONSTR is an open source project released under the GPL. You can find the source code here: https://github.com/jd-13/MONSTR-Stereo-Imaging
Screenshots
Verdict
The clearest difference is price: MONSTR at $1.99 against Sirens' Chor's $3.99. Sirens' Chor's advantage is iOS requirement (10.0 vs 12.0). On 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
Sirens' Chor costs $3.99 and MONSTR $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.
| Parameter | Sirens' Chor | MONSTR |
|---|---|---|
| Price | $3.99 | $1.99 — better |
| Rating | 4.0 (2 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 2 — better | — |
| Update frequency | Every 39 months | — |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 10.0 — better | 12.0 |
| Further details — not scored | ||
| Size | 11 MB | 8 MB |
| Age rating | 4+ | 4+ |
| Developer | Aleksandar Mlazev | Jack Devlin |
In-app purchases
Sirens' Chor
No in-app purchases
MONSTR
No in-app purchases
