# Aparillo vs Harmonic 639

The clearest difference is ads: Aparillo at none against Harmonic 639's shown. Aparillo also leads on ratings volume (507 vs 1). Harmonic 639's advantage is update cadence (monthly vs every 4 months) and device support (3 vs 1). On price, rating, in-app purchases and monetization model there is nothing between them.

Both are free to download. Aparillo sells 1 one-off in-app purchase and Harmonic 639 sells 3 in-app purchases, starting at $9.99 per month. Whichever you choose, the download price is not the number that matters.

On the App Store both sit at effectively the same score — 4.9 for Aparillo against 5.0 for Harmonic 639. That said, the two scores are not equally well evidenced: Aparillo has 507 ratings behind it against 1, so its average is the more settled of the two.

Aparillo ships an update every 4 months, Harmonic 639 monthly. The most recent releases landed on November 2, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Aparillo | Harmonic 639 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.9 (507 ratings)](https://appshunter.io/ios/app/aparillo/id1439914019/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/harmonic-639/id6761851668/reviews)** |
| Number of ratings | **507** | 1 |
| Positive reviews | 88.6% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 4 months | **Monthly** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 55 MB | 70 MB |
| Requires iOS | 17.6 | **17.0** |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Sugar Bytes GmbH](https://appshunter.io/developer/614418826) | [Robin Webber](https://appshunter.io/developer/1891777775) |

## What reviewers say

### Aparillo

[App page](https://appshunter.io/ios/app/aparillo/id1439914019)

This advanced FM synthesizer is designed for creating complex, evolving soundscapes and atmospheres ideal for film, TV, and games. It offers deep sound design capabilities with two interacting synthesizers, integrated effects, and an intuitive 'mass-controller' for one-touch sound morphing. Seamlessly integrate it into your mobile studio setup with extensive MIDI and syncing options.

**Highlights:** 16-voice FM Synthesizer, Formant Shifting, Wave Folding & Shifting, Multi-Mode Filter with Spacializer, Orbiter for one-touch Sound Morphing, 500 handpicked Presets, Full MIDI Support, Preset iCloud Sync

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Aparillo Full Version | $24.99 | one-time |

**What reviewers like**

- 🚀 Powerful sound design capabilities
- 👍 Intuitive and creative interface
- 🎨 Cinematic and otherworldly sounds
- 💡 Innovative orbit and spatial features
- 🔥 Excellent presets and sound quality

**What reviewers complain about**

- 🐛 Occasional crashes and stability issues
- 🔍 Lack of clear documentation and tutorials
- 📱 UI not optimized for larger iPad screens
- 💰 Paid upgrade required for full functionality

**Reported bugs**

- Saved patches not compatible across versions
- Orbiter parameters not accessible on latest iOS

**Requested features**

- More preset packs and sound libraries
- Improved MIDI and automation support
- Custom tuning and scale options
- Expanded keyboard and note range


### Harmonic 639

[App page](https://appshunter.io/ios/app/harmonic-639/id6761851668)

This app uses 639 Hz music and affirmations to help users release limiting beliefs and cultivate abundance. It offers a structured 21-day journey with personalized daily sessions and progress tracking.

**Highlights:** 639 Hz frequency music, Affirmations synced on screen, Personalized daily sessions, 21-day scarcity to abundance journey, Progress tracking dashboard, Mood-based browsing, Cinematic visual canvas

**Features:** macOS Compatibility, Family Sharing

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Harmonic 639 Monthly | $9.99 | per month |
| Harmonic 639 Quarterly | $19.99 | per 3 months |
| Harmonic 639 Annual | $69.99 | per year |


## Frequently asked questions

### Is Aparillo free?

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

### Is Harmonic 639 free?

Harmonic 639 is free to download, with in-app purchases available.

### Which has better reviews, Aparillo or Harmonic 639?

Harmonic 639 is rated higher. Aparillo averages 4.9 out of 5 from 507 ratings, while Harmonic 639 averages 5.0 from 1 ratings.

### Do Aparillo or Harmonic 639 have ads?

Harmonic 639 shows ads; Aparillo does not.

### Which is updated more often, Aparillo or Harmonic 639?

Aparillo ships an update every 4 months, and Harmonic 639 monthly. Most recently, Aparillo was updated on November 2, 2026 and Harmonic 639 on October 31, 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.*