# Holon vs Fluss

The clearest difference is price: Holon at Free against Fluss's $13.99. Fluss's advantage is in-app purchases (none vs 2) and rating (4.8 vs 4.5). On review sentiment, update cadence, ads and monetization model there is nothing between them.

Holon is free to download; Fluss costs $13.99 up front. Holon sells 2 one-off in-app purchases. Fluss asks for nothing beyond the download.

Fluss holds the better App Store score, 4.8 against 4.5. That said, the two scores are not equally well evidenced: Fluss has 72 ratings behind it against 14, so its average is the more settled of the two. Written reviews point the same way: 75% of Holon's written reviews are positive against 78% of Fluss's.

Both ship on a similar rhythm, roughly every 3 months. The most recent releases landed on November 2, 2026 and November 7, 2026 respectively.

## The numbers

| Metric | Holon | Fluss |
| --- | --- | --- |
| Price | **Free** | $13.99 |
| Rating | [4.5 (14 ratings)](https://appshunter.io/ios/app/holon/id1352687747/reviews) | **[4.8 (72 ratings)](https://appshunter.io/ios/app/fluss-granular-playground/id6443472888/reviews)** |
| Number of ratings | 14 | **72** |
| Positive reviews | 75.0% of reviews | **78.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 months | Every 3 months |
| Monetization | Paid | Paid |
| Size | 144 MB | 453 MB |
| Requires iOS | 12.0 | 12 |
| Devices | **iPhone, iPad, iPod, Apple Watch** | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Holonic Systems Oy](https://appshunter.io/developer/1172474856) | [Bram Bos](https://appshunter.io/developer/325340444) |

## 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 |


### Fluss

[App page](https://appshunter.io/ios/app/fluss-granular-playground/id6443472888)

Explore granular synthesis with a tactile interface. Import, record, or live-process audio to create unique sound textures, drones, and echoes. Features kinetic sliders for dynamic modulation and a unique shimmer feedback effect.

**Highlights:** Granular synthesis engine, Import, record, or live process audio, Kinetic sliders for modulation, Shimmer feedback effect, MIDI playable, Oberheim Xpander inspired filter, Microtonal experiment support

**Features:** Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 💡 Innovative touch interface
- 🎶 Great for soundscapes
- ✨ Unique sound manipulation
- 🎛️ Intuitive controls
- 🎵 Highly playable instrument

**What reviewers complain about**

- 🐛 Crashes frequently
- ⚫ Black screen issue
- 🎧 No audible output
- 🎛️ Not enough control
- 😵 Too much chaos

**Reported bugs**

- Crashes with black screen
- No audible output
- App resets when put in background
- Cyan play head difficult to see on waveform

**Requested features**

- Adjustable layer field per grain
- Record from internal microphone
- More control over grain direction
- BPM settings
- Transition from clean to new sounds


## Frequently asked questions

### Is Holon free?

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

### Is Fluss free?

Fluss costs $13.99, with no in-app purchases.

### Which has better reviews, Holon or Fluss?

Fluss is rated higher. Holon averages 4.5 out of 5 from 14 ratings, while Fluss averages 4.8 from 72 ratings.

### Do Holon or Fluss have ads?

Neither Holon nor Fluss shows ads.

### Which is updated more often, Holon or Fluss?

Holon ships an update every 3 months, and Fluss every 3 months. Most recently, Holon was updated on November 2, 2026 and Fluss on November 7, 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.*