# Holon vs Decibel John Cage Variations

The clearest difference is price: Holon at Free against Decibel John Cage Variations's $2.99. Holon also leads on device support (4 vs 1) and iOS requirement (12.0 vs 15.6). Decibel John Cage Variations's advantage is in-app purchases (none vs 2) and update cadence (every 5 weeks vs every 3 months). On ads there is nothing between them.

Holon is free to download; Decibel John Cage Variations costs $2.99 up front. Holon sells 2 one-off in-app purchases. Decibel John Cage Variations asks for nothing beyond the download.

Holon ships an update every 3 months, Decibel John Cage Variations every 5 weeks. The most recent releases landed on October 19, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Holon | Decibel John Cage Variations |
| --- | --- | --- |
| Price | **Free** | $2.99 |
| Rating | **[4.5 (14 ratings)](https://appshunter.io/ios/app/holon/id1352687747/reviews)** | — |
| Number of ratings | **14** | — |
| Positive reviews | 75.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 5 weeks** |
| Monetization | Paid | — |
| Size | 144 MB | 3 MB |
| Requires iOS | **12.0** | 15.6 |
| Devices | **iPhone, iPad, iPod, Apple Watch** | iPad |
| Age rating | 4+ | 4+ |
| Developer | [Holonic Systems Oy](https://appshunter.io/developer/1172474856) | [Monash University](https://appshunter.io/developer/427380448) |

## What reviewers say

### Holon

[App page](https://appshunter.io/ios/app/holon/id1352687747)

This app transforms your movement through cities into a dynamic, real-time musical score. It uses your physical location and activity to generate interactive synth music, encouraging outdoor exploration and turning listeners into performers.

**Highlights:** Human-powered music generation, Encourages outdoor activity, Zero UI for minimal distraction, Environmentally responsive music, Real-time synth music creation, Optional AirPods and Apple Watch integration

**Features:** Family Sharing

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Apple Watch support | Free | one-time |
| Movesense Support | Free | one-time |


### Decibel John Cage Variations

[App page](https://appshunter.io/ios/app/decibel-john-cage-variations/id1450886836)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Holon free?

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

### Is Decibel John Cage Variations free?

Decibel John Cage Variations costs $2.99, with no in-app purchases.

### Do Holon or Decibel John Cage Variations have ads?

Neither Holon nor Decibel John Cage Variations shows ads.

### Which is updated more often, Holon or Decibel John Cage Variations?

Holon ships an update every 3 months, and Decibel John Cage Variations every 5 weeks. Most recently, Holon was updated on October 19, 2026 and Decibel John Cage Variations on October 25, 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.*