# Harmonizer audio effect — Pitch shifter with 2 voices

> Real-time pitch shifter and harmonizer audio effect plugin for iOS. (iPhone/iPad app by Aleksandar Mlazev.)

- Source: https://appshunter.io/ios/app/harmonizer-audio-effect/id1209475596 (this page in markdown: same URL + `.md`)
- Developer: [Aleksandar Mlazev](https://appshunter.io/developer/1093798140)
- Category: Music, Education
- Price: $1.99
- Rating: 3.00/5 from 9 App Store ratings · 13 written reviews indexed
- Age rating: 4+
- Requires: iOS 10.0 · 14 MB
- Languages: American English
- Released: 2017-03-02
- Data updated: 2026-08-14
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/harmonizer-audio-effect/id1209475596/reviews.md

## What is Harmonizer audio effect?

Harmonizer is real time audio pitch shifter effect that can mix harmonies into the original signal or run as realtime pitch shifter. The app works as an Audio Unit plugin and can also be used as stand alone real time effect via the device microphone or using iRig or similar device. The pitch shifting does NOT affect timing so the tempo stays the same. 

Features:
- 2 harmony voices
- smooth pitch shift controls - half tones and cents
- dry volume (original voice)
- efx 1 volume (pitch shifted voice 1 volume)
- efx 2 volume (pitch shifted voice 2 volume)
- reverb (master reverb)
- EFX on/off button (in stand alone mode)


If you play acoustic instrument you can use headphones without a mic and put the phone close to your instrument so the app will work as realtime effect. Now you can play and sing with harmonies.

## Key features

- Real-time pitch shifting
- Two harmony voices
- Smooth pitch shift controls
- Adjustable voice volumes
- Master reverb effect
- Standalone mode via microphone

## Chart rankings

- #187 in Top Paid · Music (US App Store)

## Recent user reviews (10 of 13)

All indexed reviews: https://appshunter.io/ios/app/harmonizer-audio-effect/id1209475596/reviews.md

### 2/5 — Wont receive midi

*2024-04-01*

I need this app to receive midi to either use a midi controller or an lfo...but midi is not working..( btw im using it with AUM as an au3fx)
Can you fix it? Otherwise i need to get a refund...thanks

### 4/5 — Could Be A Little More Accurate, But Works Great!

*2023-12-28*

Please note you should use this app as a secondary guitar pedal within GarageBand for best results. (Unless you’re plugging into a real amp. Which, why would you? The feedback would be nuts) Not necessarily extremely accurate but MUCH better than any other pitch shifter app on the App Store for LIVE USE! All the other apps that do something similar don’t actually change the pitch. However, this one is different. Would recommend in the absence of any other suitable apps. 🔥👍🏻

### 1/5 — die

*2020-11-12*

what the hell??? are you actually kidding me? that £1.99 im giving you for being an idiot and poor human! #Charitydone

### 1/5 — Where is it then?

*2020-07-14*

I paid for an app... all I got was a little picture on my iPhone... no instructions how to work alleged app... and when trying to use it in garageband - garageband doesn’t know the app even exists!!
What is happening here?????

### 1/5 — Garbage

*2020-02-27*

App won’t even open, I feel robbed

### 2/5 — 現時点では使いものになりませんでした。

*2020-02-05*

レイテンシが少ないのは評価できますが、ピッチシフト自体が未完成で原音がエフェクト音に混ざって濁ります。
低い帯域が苦手なようでピッチシフト出来ていない場合もあります。
リングモジュレーターの亜種やグリッチ系のエフェクトとして割り切れば評価は変わるかもしれません。

### 2/5 — Terrible pitch tracking

*2019-08-25*

The shifted intervals are not at all correct. I dialed in a -5.0 semitone shift (down a perfect 4th), and it was giving me some kind of weird 6th below. Not useful for musical applications, maybe fun as a weird effect. Would like a refund.

### 1/5 — Does not work.

*2019-06-08*

Crashes every time earphones are connected. 

Would love a refund.

### 5/5 — Another great Audio Unit

*2018-05-16*

Another Great unique effect. Perfect is boring and this Audio Unit effect is definitely NOT the same old boring pitch shifter. Great job!

### 2/5 — Noisy

*2017-09-01*

It adds too much noise to the mix to be useful. If the noise could be cleaned up, it might be a worthwhile unit.

## Frequently asked questions about Harmonizer audio effect

### What is Harmonizer?

Harmonizer is a real-time audio pitch shifter effect that can mix harmonies into your original sound. It works as an Audio Unit plugin or as a standalone effect using your device's microphone or an external audio interface.

### Does Harmonizer affect the tempo?

No, the pitch shifting in Harmonizer does not affect the timing, so the tempo of your audio remains the same.

### What devices does Harmonizer support?

Harmonizer is supported on iPhone, iPad, and iPod touch devices.

### How much does Harmonizer cost?

Harmonizer is a paid app, available for $1.99.

### What is the age rating for Harmonizer?

Harmonizer has an age rating of 4+.

### When was Harmonizer last updated?

The latest version of Harmonizer was released on September 26, 2020.

### Does Harmonizer have ads?

No, Harmonizer does not contain advertisements.

### What are the main features of Harmonizer?

Key features include two harmony voices, smooth pitch shift controls (half tones and cents), adjustable dry and effect volumes, a master reverb, and an EFX on/off button for standalone mode.

## Version history (last 5 releases)

### 1.70 — 2020-09-26

iPhone 11 UI fixes and iPad crash fix

### 1.50 — 2018-08-30

fixes for new iOS update

### 1.30 — 2017-11-07

fixes

### 1.20 — 2017-03-16

second efx voice was added and some fixes made

### 1.10 — 2017-03-08

Fixes:
I am sorry for the glitch - now parameters are saved when inside garageband
also EFX on/off on stand alone mode

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## More apps by Aleksandar Mlazev

- [Fine Chromatic Tuner](https://appshunter.io/ios/app/fine-chromatic-tuner/id1093798141)
- [Frequency Sound Generator](https://appshunter.io/ios/app/frequency-sound-generator/id1098669497)
- [Fine Bass Tuner](https://appshunter.io/ios/app/fine-bass-tuner/id1099100372)
- [Sonic Synth : FM synthesizer](https://appshunter.io/ios/app/sonic-synth-fm-synthesizer/id1104940736)
- [Drum Beats Metronome](https://appshunter.io/ios/app/drum-beats-metronome/id1115616093)
- [Guitar Tabs X - tabs editor](https://appshunter.io/ios/app/guitar-tabs-x-tabs-editor/id1138809362)

All apps by Aleksandar Mlazev: https://appshunter.io/developer/1093798140

## Related topics

[harmonizer audio effect](https://appshunter.io/ios/topics/harmonizer-audio-effect) · [audio pitch effect](https://appshunter.io/ios/topics/audio-pitch-effect)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-14.*