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Harmonizr

Harmonizr

smart musical harmonizer

26 ratings
23 reviews
🎬 Entertainment
🎵 Music
$4.99

Details

  • Released
  • Updated
  • May 31, 2018
  • May 14, 2026

Features

Developer

Matthew Robbins
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Harmonizr video #1 for iPhone
Harmonizr screenshot #2 for iPhone
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About

This app allows users to create vocal harmonies by singing along to a melody. It synthesizes up to three harmony voices in the user's own voice and can be controlled via MIDI input or used as an extension in other music production apps.

✓Automatic vocal harmony synthesis
✓Real-time key center selection
✓MIDI keyboard integration
✓On-screen MIDI keyboard
✓Audio Unit (AUV3) extension support
✓Control via MIDI controller apps
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What's New in Harmonizr

1.9

May 14, 2026

Apologies, a compiler issue caused v 1.8 to not actually harmonize. Kind of the core functionality, and I didn't catch it before distributing. Thank you for your patience!

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User reviews

Most RecentHighest RatedLowest Rated

Do you stillSupport this app?

Hi - I bought this and I wonder if the reason it doesn’t work is that you haven’t updated it to work with Apples iOS systems. Please let me know as I do not get the menu screens you show online.
LNPKLNPK

BACK on the App Store!!!

Harmonizr was unavailable for a little while, but the great Developer has reopened it back on the App Store. Buy it while you can it is THE best vocal processing harmony app available. Cheers and thank you to Matthew Robbins!
GlishbaGlishba

Excellent!

Really impressed with this. Very versatile, yet straightforward to use. Really good midi implementation.
Jogging jimJogging jim

Can’t hear keyboard output

It seems like a really cool and useful app for what I’d like to do. The keyboard, however, doesn’t produce sound. What you see are lights blinking on the keys which are, I’m guessing, related to the key you’re in. Beyond that, I can’t hear anything. Would love to try out the whole app soon. Thank you.
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lakersfan72lakersfan72

So much fun for vocals and fake trumpet

I have looked for something like this for a while on the computer and never thought to check the App Store. I love the functionality and simplicity of this app.
notimelikenowto.......notimelikenowto.......
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FAQ

What is Harmonizr's price?

Harmonizr is a paid app, currently priced at $4.99. This one-time purchase grants you full access to all its features without additional costs.

What devices does Harmonizr support?

Harmonizr is compatible with iPhone, iPad, and iPod. It is designed to work seamlessly across Apple's mobile and tablet ecosystem.

How often is Harmonizr updated?

The latest version of Harmonizr is 1.7, released on August 4, 2020. While updates have not been frequent recently, the app is stable and functional.

What is the age rating for Harmonizr?

Harmonizr has an age rating of 4+, making it suitable for users of all ages. It does not contain any mature content.

Can Harmonizr be used with other music apps?

Yes, Harmonizr can be used as an Audio Unit (AUV3) extension within other music production apps like GarageBand, AUM, or Cubasis, allowing for integration into your existing workflow.

What is the user sentiment for Harmonizr?

Harmonizr has a positive user reception, with an average rating of 4.2 stars from 26 ratings. Users appreciate its unique harmonizing capabilities.

Does Harmonizr offer a free trial?

As Harmonizr is a paid application with a one-time purchase price of $4.99, it does not typically offer a free trial period. You can review its features and user ratings before purchasing.

Can I control Harmonizr with external hardware?

Yes, Harmonizr can be controlled by MIDI keyboard input, both physical and on-screen. It also supports control by MIDI controller apps like SoundPrism.