# shapesynth vs Fluss

The clearest difference is price: shapesynth at $4.99 against Fluss's $13.99. shapesynth also leads on iOS requirement (9.0 vs 12). Fluss's advantage is review sentiment (78% vs 65%) and chart position (#103 vs unranked). On rating, ratings volume, update cadence and ads there is nothing between them.

shapesynth costs $4.99 and Fluss $13.99 up front. Neither carries in-app purchases, so what you see is what you pay.

On the App Store both sit at effectively the same score — 4.9 for shapesynth against 4.8 for Fluss. Both are backed by a comparable volume of ratings — 24 and 71 respectively. Written reviews are what separate them: 65% of shapesynth's written reviews are positive against 78% of Fluss's.

shapesynth ships an update every 2 months, Fluss every 3 months. The most recent releases landed on October 23, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | shapesynth | Fluss |
| --- | --- | --- |
| Price | **$4.99** | $13.99 |
| Rating | **[4.9 (24 ratings)](https://appshunter.io/ios/app/shapesynth/id431097161/reviews)** | [4.8 (71 ratings)](https://appshunter.io/ios/app/fluss-granular-playground/id6443472888/reviews) |
| Number of ratings | 24 | **71** |
| Positive reviews | 65.1% of reviews | **78.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 3 months |
| Monetization | Paid | Paid |
| Best chart rank | — | **#103** |
| Size | 8 MB | 453 MB |
| Requires iOS | **9.0** | 12 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Erik Sigth](https://appshunter.io/developer/385275335) | [Bram Bos](https://appshunter.io/developer/325340444) |

## What reviewers say

### shapesynth

[App page](https://appshunter.io/ios/app/shapesynth/id431097161)

Create unique retro-inspired sounds by drawing oscillator waveforms. This polyphonic synthesizer offers extensive modulation options, built-in effects, and recording capabilities. Seamlessly integrate with other music apps and hardware for a versatile creative experience.

**Highlights:** Draw custom oscillator waveforms, 16-voice polyphony, Arpeggiator and stereo delay, Resonant filter, Parameter modulation via keyboard, MPE, accelerometer, Tape recorder with infinite overdubs, Inter-app audio and AUv3 support

**Features:** Vision Pro support

**In-app purchases:** none


### Fluss

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

**Currently charting:** #103 Top Paid · Music (US App Store)

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 shapesynth free?

shapesynth costs $4.99, with no in-app purchases.

### Is Fluss free?

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

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

shapesynth is rated higher. shapesynth averages 4.9 out of 5 from 24 ratings, while Fluss averages 4.8 from 71 ratings.

### Do shapesynth or Fluss have ads?

Neither shapesynth nor Fluss shows ads.

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

shapesynth ships an update every 2 months, and Fluss every 3 months. Most recently, shapesynth was updated on October 23, 2026 and Fluss on October 30, 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.*