# iDensity vs Shoom Synthesizer

The clearest difference is update cadence: iDensity at monthly against Shoom Synthesizer's every 13 months. Shoom Synthesizer's advantage is price ($6.99 vs $9.99) and iOS requirement (9.0 vs 17.0). On rating, review sentiment, ratings volume and ads there is nothing between them.

iDensity costs $9.99 and Shoom Synthesizer $6.99 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 iDensity against 4.9 for Shoom Synthesizer. Both are backed by a comparable volume of ratings — 48 and 62 respectively. Written reviews split almost evenly too, at 86% and 87% positive.

iDensity ships an update monthly, Shoom Synthesizer every 13 months. The most recent releases landed on October 21, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | iDensity | Shoom Synthesizer |
| --- | --- | --- |
| Price | $9.99 | **$6.99** |
| Rating | **[4.9 (48 ratings)](https://appshunter.io/ios/app/idensity/id464660779/reviews)** | [4.9 (62 ratings)](https://appshunter.io/ios/app/shoom-synthesizer/id1086363141/reviews) |
| Number of ratings | 48 | **62** |
| Positive reviews | 86.1% of reviews | **86.7% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Monthly** | Every 13 months |
| Monetization | Paid | Paid |
| Size | 17 MB | 16 MB |
| Requires iOS | 17.0 | **9.0** |
| Devices | **iPhone, iPad** | iPad |
| Age rating | 4+ | 4+ |
| Developer | [apeSoft](https://appshunter.io/developer/464660782) | [Yuri Turov](https://appshunter.io/developer/720810462) |

## What reviewers say

### iDensity

[App page](https://appshunter.io/ios/app/idensity/id464660779)

This app offers real-time asynchronous sound file granulation, enabling users to create a wide array of audio effects. It provides tools for time/pitch manipulation, texture generation, buffer recording, and complex sound exploration. Designed for musicians and sound designers, it offers flexibility for live performance, studio composition, and on-the-go sound design.

**Highlights:** Real-time sound granulation, Time/pitch shifting and jittering, Texture generation, Buffer recording and manipulation, Scrub pad exploration, Dynamic envelope shaping, Audio Unit (AUv3) support

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none

**What reviewers like**

- ✨ Incredible soundscapes
- 🎛️ Powerful granular synthesis
- 🎚️ Multi-channel capability (6 channels)
- 🎧 Excellent for ambient music
- 💡 Innovative sound design tool

**What reviewers complain about**

- 🤔 Steep learning curve
- 🎨 Unappealing UI/color schemes (for some)
- 🎛️ Counterintuitive controls (for some)
- 💰 In-app purchases can be costly
- ❓ Lack of clear documentation/tutorials (historically)

**Reported bugs**

- Occasional crashes (historically)
- AudioBus issues (historically)
- Preset management not working correctly (historically)
- Transport sync not working (historically)
- GUI bugs (e.g., maximizing a strand)

**Requested features**

- Independent MIDI note control over pitch for each stream
- Alphabetical preset sorting
- Load existing project name into 'Save As'
- Multi-port output for AUM/Ape Matrix
- Built-in wave-editor for sample cutting


### Shoom Synthesizer

[App page](https://appshunter.io/ios/app/shoom-synthesizer/id1086363141)

This app is an audio playground featuring three identical synthesizers controlled by an expressive XY pad. It offers a wide pitch range and supports various scales, including microtonal options. Advanced features include MIDI input, extensive modulation sources, and built-in effects for creative sound design.

**Highlights:** Three independent synthesizers, Expressive XY pad control, Microtonal and xenharmonic scale support, MIDI note input (MPE), Extensive modulation sources, Built-in stereo delay and reverb

**In-app purchases:** none

**What reviewers like**

- 🎶 Fantastic and unique sounds
- 💡 Highly expressive and versatile
- 🎨 Intuitive and inspiring UI
- 🚀 Great for experimental and ambient music
- 🎹 Excellent for live performance

**What reviewers complain about**

- ❓ Steep learning curve for some
- 🐌 Lack of frequent updates
- 🐛 Occasional bugs reported

**Reported bugs**

- Bugs encountered
- Slight sensitivity issues
- Quality loss when recording to AudioShare
- Problem with background audio

**Requested features**

- AUV3 support
- Multichannel AUV3 version
- MIDI out functionality
- MIDI note input
- Record movements feature


## Frequently asked questions

### Is iDensity free?

iDensity costs $9.99, with no in-app purchases.

### Is Shoom Synthesizer free?

Shoom Synthesizer costs $6.99, with no in-app purchases.

### Which has better reviews, iDensity or Shoom Synthesizer?

iDensity is rated higher. iDensity averages 4.9 out of 5 from 48 ratings, while Shoom Synthesizer averages 4.9 from 62 ratings.

### Do iDensity or Shoom Synthesizer have ads?

Neither iDensity nor Shoom Synthesizer shows ads.

### Which is updated more often, iDensity or Shoom Synthesizer?

iDensity ships an update monthly, and Shoom Synthesizer every 13 months. Most recently, iDensity was updated on October 21, 2026 and Shoom Synthesizer on October 13, 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.*