# Voice Synth Modular vs Spirax

The clearest difference is in-app purchases: Spirax at none against Voice Synth Modular's 2. Spirax also leads on update cadence (every 8 days vs monthly). Voice Synth Modular's advantage is iOS requirement (16.6 vs 26.0). On price, ads and device support there is nothing between them.

Both are free to download. Voice Synth Modular sells 2 one-off in-app purchases. Spirax asks for nothing beyond the download.

Voice Synth Modular ships an update monthly, Spirax every 8 days. The most recent releases landed on October 20, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | Voice Synth Modular | Spirax |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.2 (3.1K ratings)](https://appshunter.io/ios/app/voice-synth-modular/id767295197/reviews)** | — |
| Number of ratings | **3.1K** | — |
| Positive reviews | 41.3% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Monthly | **Every 8 days** |
| Monetization | Free with in-app purchases | — |
| Size | 66 MB | 5 MB |
| Requires iOS | **16.6** | 26.0 |
| Devices | **iPhone, iPad, Mac** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Qneo](https://appshunter.io/developer/319839998) | [Jan Feiler](https://appshunter.io/developer/6777787494) |

## What reviewers say

### Voice Synth Modular

[App page](https://appshunter.io/ios/app/voice-synth-modular/id767295197)

Transform your voice into a musical instrument with a suite of advanced audio effects. Create robotic voices, harmonies, and unique soundscapes using only your voice. Save and share your creations, or integrate them into your digital audio workstation.

**Highlights:** Live voice processing, Vocoders, Auto Pitch, Harmonizing Pitch Shift, Speed-Shift Sampling, Create organic soundscapes, Save and share creations

**Features:** Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Tools | Free | one-time |
| Upgrade | $8.99 | one-time |

**What reviewers like**

- 🔥 Powerful voice modulation
- 🎨 Huge array of filters and sounds
- 🎹 Ability to create beats from voice
- 🎶 Excellent for vocal performances
- 👍 Intuitive and user-friendly interface

**What reviewers complain about**

- 💰 Paid features hidden behind paywall
- 🔒 Confusing upgrade process
- 🐛 Unreliable recording and playback
- 🤔 Unintuitive workflow and lack of guidance
- 🤷‍♀️ Inconsistent functionality across updates

**Reported bugs**

- Crashes and freezes when using certain features
- Microphone not detected or working properly
- Imported audio files not playing back correctly
- Presets and settings not saving or loading properly

**Requested features**

- Ability to record and process own voice
- Deeper integration with music production apps
- More customization and preset options
- Better documentation and tutorials
- System audio capture and processing


### Spirax

[App page](https://appshunter.io/ios/app/spirax/id6777787492)

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

**In-app purchases:** none


## Frequently asked questions

### Is Voice Synth Modular free?

Voice Synth Modular is free to download, with in-app purchases available.

### Is Spirax free?

Spirax is free to download, with no in-app purchases.

### Do Voice Synth Modular or Spirax have ads?

Neither Voice Synth Modular nor Spirax shows ads.

### Which is updated more often, Voice Synth Modular or Spirax?

Voice Synth Modular ships an update monthly, and Spirax every 8 days. Most recently, Voice Synth Modular was updated on October 20, 2026 and Spirax on October 10, 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.*