# iDousyn vs Spectrum Synthesizer Bundle

The clearest difference is review sentiment: Spectrum Synthesizer Bundle at 93% against iDousyn's 34%. Spectrum Synthesizer Bundle also leads on price (Free vs $9.99) and rating (4.8 vs 4.2). On ratings volume, ads and device support there is nothing between them.

Spectrum Synthesizer Bundle is free to download; iDousyn costs $9.99 up front. iDousyn sells 1 one-off in-app purchase. Spectrum Synthesizer Bundle asks for nothing beyond the download.

Spectrum Synthesizer Bundle holds the better App Store score, 4.8 against 4.2. Both are backed by a comparable volume of ratings — 159 and 135 respectively. Written reviews point the same way: 34% of iDousyn's written reviews are positive against 93% of Spectrum Synthesizer Bundle's.

iDousyn ships an update every 2 months, Spectrum Synthesizer Bundle every 4 weeks. The most recent releases landed on October 13, 2026 and October 21, 2026 respectively.

## The numbers

| Metric | iDousyn | Spectrum Synthesizer Bundle |
| --- | --- | --- |
| Price | $9.99 | **Free** |
| Rating | [4.2 (159 ratings)](https://appshunter.io/ios/app/idousyn/id421852860/reviews) | **[4.8 (135 ratings)](https://appshunter.io/ios/app/spectrum-synthesizer-bundle/id1467384251/reviews)** |
| Number of ratings | **159** | 135 |
| Positive reviews | 34.1% of reviews | **92.9% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 4 weeks** |
| Monetization | **Free with in-app purchases** | Paid |
| Size | 1.2 GB | 13 MB |
| Requires iOS | 26.0 | **11.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Jorge Lozada](https://appshunter.io/developer/421852863) | [Thomas Burns](https://appshunter.io/developer/522224284) |

## What reviewers say

### iDousyn

[App page](https://appshunter.io/ios/app/idousyn/id421852860)

This app transforms your device into a professional music production tool. It features a sample-based synthesizer with dual-layer sampling, advanced filters, and a professional effects chain. Create immersive sounds and build captivating tracks with an intuitive interface and extensive sound library.

**Highlights:** Dual-layer sampling, Advanced filters and EQ, Professional effects chain, Creative chord pads, MIDI mastery, Expansive sound library

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock Pro | Free | one-time |


### Spectrum Synthesizer Bundle

[App page](https://appshunter.io/ios/app/spectrum-synthesizer-bundle/id1467384251)

This app provides a bundle of four professional audio unit synthesizers and one effect, inspired by popular eurorack modules. Explore diverse sound design possibilities with multi-mode oscillators, modal synthesis, string generation, and granular sampling. Compatible with DAWs and AU hosts for creative music production.

**Highlights:** Multi-mode polyphonic oscillator, Modal synthesis, String generation algorithms, Granular sampler and looper, Modulation LFO and ADSR envelope, XY touchpad and modulation matrix

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

**In-app purchases:** none

**What reviewers like**

- ✨ Incredible sound quality
- 🎶 Deep modulation capabilities
- 💡 Distinct and unique character
- 🌊 Excels at fluid soundbeds
- 🎹 Great for MIDI keyboard use

**What reviewers complain about**

- 🐛 Crashes more than it should
- ⚠️ Description misleading (granular synth missing)
- 🐛 Modal synthesizer doesn't work alone
- 💥 Creates massive feedback on macOS
- ❌ UI stripped down

**Reported bugs**

- Crashes more than it should
- Modal synthesizer doesn't work on its own
- Creates massive feedback on macOS
- Songs won't export from GarageBand iOS when plugin is enabled
- Lots of crashes since previous update

**Requested features**

- Bring back granular synth or remove from description
- Create a standalone version
- Bring back old UI as an option
- Advanced version with standalone apps, proper GUI, and extensive modulation/control
- More Mutable ports (Ripples, Stages)


## Frequently asked questions

### Is iDousyn free?

iDousyn costs $9.99, and also offers in-app purchases.

### Is Spectrum Synthesizer Bundle free?

Spectrum Synthesizer Bundle is free to download, with no in-app purchases.

### Which has better reviews, iDousyn or Spectrum Synthesizer Bundle?

Spectrum Synthesizer Bundle is rated higher. iDousyn averages 4.2 out of 5 from 159 ratings, while Spectrum Synthesizer Bundle averages 4.8 from 135 ratings.

### Do iDousyn or Spectrum Synthesizer Bundle have ads?

Neither iDousyn nor Spectrum Synthesizer Bundle shows ads.

### Which is updated more often, iDousyn or Spectrum Synthesizer Bundle?

iDousyn ships an update every 2 months, and Spectrum Synthesizer Bundle every 4 weeks. Most recently, iDousyn was updated on October 13, 2026 and Spectrum Synthesizer Bundle on October 21, 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.*