# Harmonicer vs ChaosArp

The clearest difference is update cadence: Harmonicer at every 4 days against ChaosArp's every 2 weeks. Harmonicer also leads on iOS requirement (11.0 vs 13.0). ChaosArp's advantage is price ($3.99 vs $7.99) and rating (4.9 vs 4.7). On review sentiment, ratings volume, ads and in-app purchases there is nothing between them.

Harmonicer costs $7.99 and ChaosArp $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ChaosArp holds the better App Store score, 4.9 against 4.7. Both are backed by a comparable volume of ratings — 12 and 9 respectively. Written reviews point the same way: 80% of Harmonicer's written reviews are positive against 83% of ChaosArp's.

Harmonicer ships an update every 4 days, ChaosArp every 2 weeks. The most recent releases landed on October 21, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | Harmonicer | ChaosArp |
| --- | --- | --- |
| Price | $7.99 | **$3.99** |
| Rating | [4.7 (12 ratings)](https://appshunter.io/ios/app/harmonicer/id6468485333/reviews) | **[4.9 (9 ratings)](https://appshunter.io/ios/app/chaosarp/id6497066359/reviews)** |
| Number of ratings | **12** | 9 |
| Positive reviews | 80.0% of reviews | **83.3% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 4 days** | Every 2 weeks |
| Monetization | Paid | Paid |
| Best chart rank | — | **#183** |
| Size | 23 MB | 17 MB |
| Requires iOS | **11.0** | 13.0 |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Kai Aras](https://appshunter.io/developer/370820899) | [Achillefs Sourlas](https://appshunter.io/developer/6813431693) |

## What reviewers say

### Harmonicer

[App page](https://appshunter.io/ios/app/harmonicer/id6468485333)

This app generates musical inspiration by combining MIDI quantization, harmonization, and arpeggiation. It offers extensive scale support and allows for the creation of complex chords and rhythmic patterns to enhance musical compositions.

**Highlights:** 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

**Features:** Vision Pro support

**In-app purchases:** none


### ChaosArp

[App page](https://appshunter.io/ios/app/chaosarp/id6497066359)

**Currently charting:** #183 Top Paid · Music (US App Store)

This music app generates complex and dynamic MIDI patterns using advanced algorithms. It offers a unique rhythm event feature and variance control for extensive customization, allowing users to create evolving musical sequences.

**Highlights:** Arpeggiator and step sequencer modes, Rhythm event feature with 13 algorithms, Pitch and rhythm variance control, Scale quantizer, Randomizable velocity and duration, 4 performance buttons

**In-app purchases:** none


## Frequently asked questions

### Is Harmonicer free?

Harmonicer costs $7.99, with no in-app purchases.

### Is ChaosArp free?

ChaosArp costs $3.99, with no in-app purchases.

### Which has better reviews, Harmonicer or ChaosArp?

ChaosArp is rated higher. Harmonicer averages 4.7 out of 5 from 12 ratings, while ChaosArp averages 4.9 from 9 ratings.

### Do Harmonicer or ChaosArp have ads?

Neither Harmonicer nor ChaosArp shows ads.

### Which is updated more often, Harmonicer or ChaosArp?

Harmonicer ships an update every 4 days, and ChaosArp every 2 weeks. Most recently, Harmonicer was updated on October 21, 2026 and ChaosArp on October 11, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*