Comparison

Harmonica Simulator Free vs Sirens' Chor

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Harmonica Simulator Free

This application offers a realistic 10-hole harmonica simulation with authentic studio-quality sound. It features a variety of rhythms, chords, and the ability to simulate both blowing and suction, making it easy to use for creating music.

Highlights
  • 10-hole standard harmonica simulation
  • Real studio-quality sound
  • Includes chords and rhythms
  • Simulates blow and suction
  • Adjustable rhythm speed
  • Transpose from -20 to +20%
Features
Read full description

this is a special professional application that simulates the 10 hole real standard harmonica this app is completely different with other apps and i promise that you won't see any app like this with real sound , easy to use and real usage specially with accords and rhythms you can find many similar apps in app store , but the difference is this app has accords , rhythms and real sound that you can find is it the real harmonica or an app !! its free . try it ! just see the video below to be amazed !! https://www.youtube.com/watch?v=PfHZ6xDd7VM the app specifics are : - has up to 36 pop / oriental / turkish / arabic / iranian / western rhythm styles - has 12 accords that are used in this type of music - simulate both blow and suction that is used in real instrument - very easy to use - has ability to change the rhythm speed - transpose ability from -20 to +20 percents - real sound that is made in professional studio - 6 voice pads that has sound such as Scream.. OH... Applause... YEAH... voices

About

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.

Highlights
  • Harmonic analysis of input audio
  • Sine wave oscillator synthesis
  • Adjustable chorus effect
  • Second voice generation
  • AUV3 plugin support
Read 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

Screenshots

Harmonica Simulator Free3 screens
Sirens' Chor2 screens

Verdict

The call

The clearest difference is review sentiment: Sirens' Chor at 100% against Harmonica Simulator Free's 0%. Sirens' Chor also leads on rating (4.0 vs 3.0). Harmonica Simulator Free's advantage is price (Free vs $3.99) and update cadence (every 6 months vs every 39 months). 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

CostPrice · In-app purchases · Ads · Monetization

Harmonica Simulator Free is free to download; Sirens' Chor costs $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Sirens' Chor holds the better App Store score, 4.0 against 3.0. Both are backed by a comparable volume of ratings — 6 and 2 respectively. Written reviews point the same way: 0% of Harmonica Simulator Free's written reviews are positive against 100% of Sirens' Chor's.

UpkeepUpdate frequency

Harmonica Simulator Free ships an update every 6 months, Sirens' Chor every 39 months. The most recent releases landed on August 21, 2026 and June 21, 2026 respectively.

Scorecard7 real differences · 3 level
Harmonica Simulator Free versus Sirens' Chor: the parameters behind the verdict, then further details
ParameterHarmonica Simulator FreeSirens' Chor
PriceFree — better$3.99
Rating3.0 (6 ratings)4.0 (2 ratings) — better
Positive reviews0.0% of reviews100.0% of reviews — better
Number of ratings6 — better2
Update frequencyEvery 6 months — betterEvery 39 months
AdsNoNo
In-app purchasesNoNo
MonetizationFree — betterPaid
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS8.0 — better10.0
Further details — not scored
Size71 MB11 MB
Age rating4+4+
DeveloperSENIOR ELECTRON LLCAleksandar Mlazev

Customer experience

Harmonica Simulator Free

All ratings6 ratings
Positive50.0%
Neutral0.0%
Negative50.0%
Written reviews2 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

Sirens' Chor

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews3 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Harmonica Simulator Free

No in-app purchases

None

Sirens' Chor

No in-app purchases

Questions

Is Harmonica Simulator Free free?
Harmonica Simulator Free is free to download, with no in-app purchases.
Is Sirens' Chor free?
Sirens' Chor costs $3.99, with no in-app purchases.
Which has better reviews, Harmonica Simulator Free or Sirens' Chor?
Sirens' Chor is rated higher. Harmonica Simulator Free averages 3.0 out of 5 from 6 ratings, while Sirens' Chor averages 4.0 from 2 ratings.
Do Harmonica Simulator Free or Sirens' Chor have ads?
Neither Harmonica Simulator Free nor Sirens' Chor shows ads.
Which is updated more often, Harmonica Simulator Free or Sirens' Chor?
Harmonica Simulator Free ships an update every 6 months, and Sirens' Chor every 39 months. Most recently, Harmonica Simulator Free was updated on August 21, 2026 and Sirens' Chor on June 21, 2026.

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