# Harmonicer — Harmonic MIDI Generator

> MIDI quantizer, harmonizer, and arpeggiator for music creation. (iPhone/iPad app by Kai Aras.)

- Source: https://appshunter.io/ios/app/harmonicer/id6468485333 (this page in markdown: same URL + `.md`)
- Developer: [Kai Aras](https://appshunter.io/developer/370820899)
- Category: Music
- Price: $7.99
- Rating: 4.70/5 from 12 App Store ratings · 5 written reviews indexed
- Age rating: 4+
- Requires: iOS 11.0 · 23 MB
- Languages: American English
- Released: 2024-06-20
- Data updated: 2026-08-24
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/harmonicer/id6468485333/reviews.md

## What is Harmonicer?

Instant Inspiration at Your Fingertips

Harmonicer combines MIDI Quantizer, Harmonizer and Arpeggiator into one convenient package. 

At the core of Harmonicer lies its Quantizer feature with over 20 pre defined scales and support for custom scales. Whether you're a seasoned composer or a novice musician, Harmonicer empowers you to effortlessly create melodies that are harmonically rich and sonically captivating.

Unlock Limitless Harmonic Possibilities

Harmonicer's Harmonizer functionality takes your compositions to new heights by automatically generating lush chords and harmonies. With up to 4 additional voices and intuitive controls, you can explore a vast array of harmonic possibilities and infuse your music with depth and emotion.

Unleash Your Creativity with Dynamic Arpeggiation

With Harmonicer's Arpeggiator, intricate rhythmic patterns and melodic sequences are just a few taps away. Whether you're crafting pulsating basslines, mesmerizing synth leads, or intricate melodies, the Arpeggiator empowers you to infuse your tracks with movement and energy, adding a dynamic edge to your music.

Combining Power and Versatility

What sets Harmonicer apart is its seamless integration of these three powerful tools, allowing users to utilize them individually or in combination to achieve complex compositions with ease. Whether you're looking to fine-tune a melody, enrich your harmonies, or add rhythmic complexity, Harmonicer provides the tools you need to inspire your musical vision and bring it to life. 

Specs:
- Quantizer with support for 20+ pre defined as well as custom scales
- Harmonizer with up to 4 additional voices
- Arpeggiator with 10 modes, note repeates, ratchets and more 
- Process MIDI from any source
- Standalone use via internal keyboard 

Supports:
- Standalone
- AUv3

## Key features

- MIDI Quantizer with 20+ scales
- Custom scale support
- Harmonizer with up to 4 voices
- Arpeggiator with 10 modes
- Process MIDI from any source
- Standalone use with internal keyboard

## Chart rankings

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

## Recent user reviews (5 of 5)

All indexed reviews: https://appshunter.io/ios/app/harmonicer/id6468485333/reviews.md

### 2/5 — Frustratingly broken UI in AUM (11” M4)

*2025-07-01*

Sometimes I’ll get lucky and find a window size that gives me a mostly readable user interface, then the app is a lot of fun. 

Most of the time it’s corrupted and unusable, UI elements are misplaced/overlapping and text is garbled. Resizing the window in AUM to try and fix one thing just breaks another, and that just ends up frustrating.

I hoped this might be an easy fix but I reported it a few months back now, no response yet.

### 5/5 — Works well in Logic Pro on macOS

*2024-08-29*

!!!

### 5/5 — Well, it’s very very good

*2024-07-09*

I can’t believe no one has reviewed this little beauty yet. 

Set up in AUM with three IOS synths set to 3 different voices and there are so many possibilities and permutations. Great flexibility in voice intervals, scales, arpeggiators - it’s all there in one compact little package. For the price of a Frappuccino, it’s a no-brainier.

### 5/5 — I like this app.

*2024-07-09*

I bought this a few days ago and it’s versatile and useful.

### 4/5 — Really nice but

*2024-06-23*

Using a sequencer in AUM  if you give it multiple long notes at once it will lock on. But I think it’s the nature of the beast being midi. Lots of fun otherwise.

## Frequently asked questions about Harmonicer

### What is Harmonicer?

Harmonicer is a music creation tool that integrates MIDI quantization, harmonization, and arpeggiation. It helps users generate musical ideas and add complexity to their compositions.

### What scales does Harmonicer support?

Harmonicer supports over 20 pre-defined scales and also allows for the creation and use of custom scales, offering extensive harmonic possibilities.

### How many voices can Harmonicer generate for harmonies?

The Harmonizer feature in Harmonicer can generate up to 4 additional voices, allowing for rich and layered chord progressions.

### What are the arpeggiator modes in Harmonicer?

Harmonicer's Arpeggiator includes 10 different modes, along with features like note repeats and ratchets, to create dynamic rhythmic patterns and melodic sequences.

### Can Harmonicer be used with other music software?

Yes, Harmonicer supports AUv3 and can process MIDI from any source, making it versatile for integration with other music production tools.

### Does Harmonicer have ads?

No, Harmonicer does not contain advertisements. It is a paid application designed for a seamless user experience.

### What devices is Harmonicer compatible with?

Harmonicer is available for Mac, iPhone, iPad, and iPod, allowing users to create music across multiple Apple devices.

### How often is Harmonicer updated?

Harmonicer was last updated on July 19, 2024, with version 1.0.6. This indicates a commitment to ongoing development and improvements.

## Version history (last 5 releases)

### 1.0.6 — 2024-07-19

- Added additional intervals to the Harmonizer Section
- Improved input via Computer Keyboard
- Minor Visual Tweaks

### 1.0.4 — 2024-07-04

Harmonicer now works on iPhone!

### 1.0.3 — 2024-06-28

- Fixed an issue where automating or CC mapping parameters would not work properly
- Fixed an issue where the Arpeggiator would stop working in some cases

### 1.0.2 — 2024-06-24

- AUv3 will now move the keyboard to the bottom when resized 
- Fixed an issue where the progression recorder would not sync properly with the host timeline 
- Fixed an issue where the progression recorder would improperly react to AUM transport controls 
- Fixed several edge cases where hanging notes might have occurred

### 1.0.1 — 2024-06-21

- Fixed an issue where changing scales while receiving MIDI input would stop the plugin from generating MIDI in some cases
- Fixed an issue where changing scale or root while receiving MIDI input would create hanging notes in some cases
- Fixed an issue where the arpeggiator would use fixed velocity regardless of the input 
- Fixed an issue where the plugin would expose additional MIDI in ports 
- Fixed an issue where using the arp variation would cause hanging notes in some cases
- Fixed an issue where +/- octave intervals were incorrect for some scales

## Apps similar to Harmonicer

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Prism MIDI Sequencer](https://appshunter.io/ios/app/prism-midi-sequencer/id6502302630) | 4.8 (33) | $19.99 | Music |
| [Ringotron](https://appshunter.io/ios/app/ringotron/id6474263444) | 5.0 (15) | $8.99 | Music |
| [Surreal Machines Modnetic](https://appshunter.io/ios/app/surreal-machines-modnetic/id6451084427) | 5.0 (11) | $9.99 | Music |
| [Zodiak Taurus Mega Octavizer](https://appshunter.io/ios/app/zodiak-taurus-mega-octavizer/id6624294633) | 4.6 (15) | $14.99 | Music |
| [healingBowl](https://appshunter.io/ios/app/healingbowl/id6504465001) | 3.5 (6) | $4.99 | Music |
| [Kebarp AUv3 MIDI Arpeggiator](https://appshunter.io/ios/app/kebarp-auv3-midi-arpeggiator/id6479562640) | 4.8 (12) | $5.99 | Music |

## More apps by Kai Aras

- [MIDIBrute](https://appshunter.io/ios/app/midibrute/id1010753735)
- [RP-1 Delay](https://appshunter.io/ios/app/rp-1-delay/id1079530569)
- [RF-1 Reverb](https://appshunter.io/ios/app/rf-1-reverb/id1097763239)
- [VC-1 Chorus](https://appshunter.io/ios/app/vc-1-chorus/id1130683829)
- [Italizer](https://appshunter.io/ios/app/italizer/id1133091743)
- [VOLT Synth](https://appshunter.io/ios/app/volt-synth/id1185984394)

All apps by Kai Aras: https://appshunter.io/developer/370820899

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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 2026-08-24.*