# Voice Synth Modular vs SynthMaster One for iPhone

The clearest difference is rating: SynthMaster One for iPhone at 4.8 against Voice Synth Modular's 4.2. SynthMaster One for iPhone also leads on review sentiment (66% vs 41%) and iOS requirement (10.0 vs 16.6). Voice Synth Modular's advantage is ratings volume (3K vs 331). On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Voice Synth Modular sells 2 one-off in-app purchases and SynthMaster One for iPhone sells 10 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

SynthMaster One for iPhone holds the better App Store score, 4.8 against 4.2. That said, the two scores are not equally well evidenced: Voice Synth Modular has 3K ratings behind it against 331, so its average is the more settled of the two. Written reviews point the same way: 41% of Voice Synth Modular's written reviews are positive against 66% of SynthMaster One for iPhone's.

Voice Synth Modular ships an update monthly, SynthMaster One for iPhone every 2 months. The most recent releases landed on September 30, 2026 and September 19, 2026 respectively.

## The numbers

| Metric | Voice Synth Modular | SynthMaster One for iPhone |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.2 (3K ratings)](https://appshunter.io/ios/app/voice-synth-modular/id767295197/reviews) | **[4.8 (331 ratings)](https://appshunter.io/ios/app/synthmaster-one-for-iphone/id1490902617/reviews)** |
| Number of ratings | **3K** | 331 |
| Positive reviews | 41.3% of reviews | **66.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Monthly** | Every 2 months |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 66 MB | 297 MB |
| Requires iOS | 16.6 | **10.0** |
| Devices | **iPhone, iPad, Mac** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Qneo](https://appshunter.io/developer/319839998) | [KV331 Audio](https://appshunter.io/developer/944155925) |

## 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


### SynthMaster One for iPhone

[App page](https://appshunter.io/ios/app/synthmaster-one-for-iphone/id1490902617)

This powerful wavetable synthesizer app offers an intuitive workflow for creating new sounds. It features a rich library of wavetables, inspiring factory presets, and real-time modulation feedback for sound design.

**Highlights:** Wavetable synthesis, 300 factory presets, AUv3 support, Files App integration, Real-time modulation feedback, Semi-modular architecture, 32-step arpeggiator/sequencer

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| BigTone Club Construction Set | $4.99 | one-time |
| True Trance Sounds Volume 1 | $4.99 | one-time |
| Vandalism Future House | $4.99 | one-time |
| NatLife Retrowave Sounds Vol.1 | $4.99 | one-time |
| Demis Hellen Euphoric Trance | $4.99 | one-time |
| NatLife Progressive&Deep Vol.1 | $4.99 | one-time |
| Vandalism Shocking Future Bass | $4.99 | one-time |
| Venus Theory Trap Sounds | $4.99 | one-time |
| Desktop Presets Upgrade | $9.99 | one-time |
| SM One Expansions Bundle | $24.99 | one-time |

**What reviewers like**

- ✨ Excellent sound quality
- 🤩 Incredible features for free
- 👍 Easy to use interface
- 🎛️ Versatile sound design capabilities
- 🎵 Great for GarageBand integration

**What reviewers complain about**

- 🐛 Frequent crashes
- 🔌 Issues with GarageBand integration
- 💸 In-app purchase problems
- 🔄 Presets not saving
- 📉 App appears abandoned

**Reported bugs**

- App crashes when loading saved presets
- App crashes when setting default sound
- AUv3 option disappears in GarageBand
- Inability to reload user patches without crashing
- Inability to purchase certain IAP packs

**Requested features**

- Fix in-app purchase issues
- Improve GarageBand AUv3 stability
- Enable saving of custom presets
- Address crashing when loading presets
- Fix note pitch issues


## Frequently asked questions

### Is Voice Synth Modular free?

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

### Is SynthMaster One for iPhone free?

SynthMaster One for iPhone is free to download, with in-app purchases available.

### Which has better reviews, Voice Synth Modular or SynthMaster One for iPhone?

SynthMaster One for iPhone is rated higher. Voice Synth Modular averages 4.2 out of 5 from 3K ratings, while SynthMaster One for iPhone averages 4.8 from 331 ratings.

### Do Voice Synth Modular or SynthMaster One for iPhone have ads?

Neither Voice Synth Modular nor SynthMaster One for iPhone shows ads.

### Which is updated more often, Voice Synth Modular or SynthMaster One for iPhone?

Voice Synth Modular ships an update monthly, and SynthMaster One for iPhone every 2 months. Most recently, Voice Synth Modular was updated on September 30, 2026 and SynthMaster One for iPhone on September 19, 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.*