# Harmonicer vs Gradient Synth

The clearest difference is price: Gradient Synth at Free against Harmonicer's $7.99. Gradient Synth also leads on ratings volume (54 vs 12). Harmonicer's advantage is in-app purchases (none vs 5) and update cadence (every 4 days vs monthly). On ads there is nothing between them.

Gradient Synth is free to download; Harmonicer costs $7.99 up front. Gradient Synth sells 5 in-app purchases, starting at $9.99 per year. Harmonicer asks for nothing beyond the download.

Harmonicer holds the better App Store score, 4.7 against 4.4. Both are backed by a comparable volume of ratings — 12 and 54 respectively. Written reviews point the same way: 80% of Harmonicer's written reviews are positive against 63% of Gradient Synth's.

Harmonicer ships an update every 4 days, Gradient Synth monthly. The most recent releases landed on September 17, 2026 and September 18, 2026 respectively.

## The numbers

| Metric | Harmonicer | Gradient Synth |
| --- | --- | --- |
| Price | $7.99 | **Free** |
| Rating | **[4.7 (12 ratings)](https://appshunter.io/ios/app/harmonicer/id6468485333/reviews)** | [4.4 (54 ratings)](https://appshunter.io/ios/app/gradient-synth/id6477543878/reviews) |
| Number of ratings | 12 | **54** |
| Positive reviews | **80.0% of reviews** | 62.5% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 4 days** | Monthly |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 23 MB | 12 MB |
| Requires iOS | **11.0** | 17.0 |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Kai Aras](https://appshunter.io/developer/370820899) | [Apps Are Fun LLC](https://appshunter.io/developer/1659934806) |

## 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


### Gradient Synth

[App page](https://appshunter.io/ios/app/gradient-synth/id6477543878)

Transform colors into unique sounds with this intuitive music creation app. Designed for beginners and children, it offers a user-friendly interface and powerful features to explore and customize a wide range of audio experiences.

**Highlights:** Preset Generator, Color-based sound customization, User-friendly interface, MIDI keyboard integration, Dynamic audio effects, Polyphony

**Features:** macOS Compatibility

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Gradient Synth Supporter (Yearly) | $9.99 | per year |
| Unlimited Presets | $19.99 | per year |
| 10 Presets | $0.99 | one-time |
| 75 Presets | $4.99 | one-time |
| Lifetime Unlock | $12.99 | one-time |


## Frequently asked questions

### Is Harmonicer free?

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

### Is Gradient Synth free?

Gradient Synth is free to download, with in-app purchases available.

### Which has better reviews, Harmonicer or Gradient Synth?

Harmonicer is rated higher. Harmonicer averages 4.7 out of 5 from 12 ratings, while Gradient Synth averages 4.4 from 54 ratings.

### Do Harmonicer or Gradient Synth have ads?

Neither Harmonicer nor Gradient Synth shows ads.

### Which is updated more often, Harmonicer or Gradient Synth?

Harmonicer ships an update every 4 days, and Gradient Synth monthly. Most recently, Harmonicer was updated on September 17, 2026 and Gradient Synth on September 18, 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.*