Harmonizr is a vocal harmonizer offering a unique and fun user interface. Plug in a pair of headphones and sing a melody, tapping the correct key center buttons, and Harmonizr will follow, synthesizing up to three voices of automatic harmony in your own voice. Plug in a MIDI keyboard, or use the on-screen one, and you can sing harmony like Imogen Heap or Jacob Collier, matching every note you play. Harmonizr also can also be used as an Audio Unit extension within other apps, such as GarageBand, AUM, or Cubasis, and can be controlled by MIDI controller apps like SoundPrism.

What’s New

Version 1.3

* Fixed problem with MIDI button not turning off manual voices.
* Harmonizr now responds to MIDI program change messages, allowing it to follow your other MIDI gear from song to song on stage.
* Added new stereo modes: mono, and split, where the dry signal goes in channel one, and the harmony voices in channel 2.
* Cosmetic improvements to the interface.

Ratings and Reviews

4.1 out of 5
16 Ratings

16 Ratings

itsrifat ,

Would give a 5 star if had support for midi controller

Great app. Works fine with audiobus. Would be nice to have the ability to turn on/off the harmonizr through usb midi controller. I see it has an option to pair bluetooth midi controller, but not sure what it does since i don't have one.

swancakes ,

Really good and getting better

I’ve been really impressed with this app and am working it into my live workflow. I love the amount of options it provides for control of harmonies, wet/dry, pitch correction, etc. Like another reviewer mentioned, a way to assign bypass to a MIDI cc would be helpful, as well as the ability to use the ‘solo’ feature when not passing the dry signal (ie, temporarily pass dry signal when in solo mode, for announcements). Now just waiting for BeatMaker 3 to support MIDI AU... This app has crazy potential once MIDI AU gains more adoption. Thank you for your hard work!

Hard Writer ,

Really Good App

The sound and harmonies are really well done, although there are a few things I wish the app had. First, I wish there was some place to find help, or at least tell you what some of the buttons do. Second, I'd love to use this with other apps like GarageBand if possible. Finally, I'd like to be able to configure chords and have a little tab with all the chords you need for a specific project, so I don't have to jump around tapping or play on that tiny keyboard. Overall, I'm glad I found the app, but I'd definitely be more comfortable with the price tag with the aforementioned changes.


Matthew Robbins
19.1 MB

Requires iOS 10.2 or later. Compatible with iPhone, iPad, and iPod touch.



Age Rating


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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