# Harmony Voice vs SynthMaster One

The clearest difference is rating: SynthMaster One at 4.7 against Harmony Voice's 2.3. SynthMaster One also leads on review sentiment (64% vs 33%) and ratings volume (743 vs 24). Harmony Voice's advantage is in-app purchases (none vs 11) and price ($4.99 vs $9.99). On ads and device support there is nothing between them.

Harmony Voice costs $4.99 and SynthMaster One $9.99 up front. SynthMaster One sells 11 one-off in-app purchases. Harmony Voice asks for nothing beyond the download.

SynthMaster One holds the better App Store score, 4.7 against 2.3. That said, the two scores are not equally well evidenced: SynthMaster One has 743 ratings behind it against 24, so its average is the more settled of the two. Written reviews point the same way: 33% of Harmony Voice's written reviews are positive against 64% of SynthMaster One's.

Harmony Voice ships an update every 6 months, SynthMaster One every 2 months. The most recent releases landed on September 30, 2026 and September 28, 2026 respectively.

## The numbers

| Metric | Harmony Voice | SynthMaster One |
| --- | --- | --- |
| Price | **$4.99** | $9.99 |
| Rating | [2.3 (24 ratings)](https://appshunter.io/ios/app/harmony-voice/id532501340/reviews) | **[4.7 (743 ratings)](https://appshunter.io/ios/app/synthmaster-one/id1254353266/reviews)** |
| Number of ratings | 24 | **743** |
| Positive reviews | 33.3% of reviews | **63.8% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 2 months** |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 28 MB | 402 MB |
| Requires iOS | **8.0** | 10.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Harry Gohs](https://appshunter.io/developer/382428644) | [KV331 Audio](https://appshunter.io/developer/944155925) |

## What reviewers say

### Harmony Voice

[App page](https://appshunter.io/ios/app/harmony-voice/id532501340)

Create a vocal choir from your own voice with up to four harmonized parts. This app offers real-time pitch correction, automatic chord generation, and voice character modification. Enhance your singing with professional effects and easily record and export your creations.

**Highlights:** Four-part real-time harmonizer, Automatic tuning correction, Manual and automatic harmonization modes, Voice character adjustment, Hi-end reverb and chorus effects, Audio recorder with metronome, SoundCloud upload and file export

**Features:** Vision Pro support

**In-app purchases:** none


### SynthMaster One

[App page](https://appshunter.io/ios/app/synthmaster-one/id1254353266)

This powerful wavetable synthesizer app offers an intuitive workflow for creating unique sounds. It features a rich library of wavetables, inspiring presets, and a semi-modular architecture for deep sound design. Easily sync data across devices and integrate with DAWs.

**Highlights:** Wavetable synthesis, Semi-modular architecture, 650 factory presets, AUv3 support, Cross-platform cloud sync, Real-time modulation feedback, 32-step arpeggiator/sequencer

**In-app purchases (11)**

| 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 |
| Venus Theory Trap Sounds | $4.99 | one-time |
| Vandalism Shocking Future Bass | $4.99 | one-time |
| NatLife Progressive&Deep Vol.1 | $4.99 | one-time |
| Bluffmunkey Cinematic Sounds | $4.99 | one-time |
| Desktop Presets Upgrade | $7.99 | one-time |
| SM One Expansions Bundle | $24.99 | one-time |

**What reviewers like**

- 🚀 Powerful synth engine
- 👍 Extensive preset library
- 🎨 Versatile sound design capabilities
- 💡 Free desktop version expansions on iPad
- 🎹 Excellent sound quality and tone

**What reviewers complain about**

- 🐛 Crashes and stability issues
- 🔋 Battery drain in background
- 🤔 Confusing in-app purchase system
- 👎 UI/UX could use improvement
- 🔇 Audio issues and no sound

**Reported bugs**

- Stuck notes and MIDI issues
- Preset loading crashes
- Restore purchases not working
- Incompatibility with certain DAWs

**Requested features**

- Add custom wavetable support
- Improve MIDI mapping and MPE functionality
- Optimize performance on older devices
- Streamline preset management and browsing


## Frequently asked questions

### Is Harmony Voice free?

Harmony Voice costs $4.99, with no in-app purchases.

### Is SynthMaster One free?

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

### Which has better reviews, Harmony Voice or SynthMaster One?

SynthMaster One is rated higher. Harmony Voice averages 2.3 out of 5 from 24 ratings, while SynthMaster One averages 4.7 from 743 ratings.

### Do Harmony Voice or SynthMaster One have ads?

Neither Harmony Voice nor SynthMaster One shows ads.

### Which is updated more often, Harmony Voice or SynthMaster One?

Harmony Voice ships an update every 6 months, and SynthMaster One every 2 months. Most recently, Harmony Voice was updated on September 30, 2026 and SynthMaster One on September 28, 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.*