# UNO Synth Editor vs SynthMaster One for iPhone

The clearest difference is rating: SynthMaster One for iPhone at 4.8 against UNO Synth Editor's 3.8. SynthMaster One for iPhone also leads on review sentiment (66% vs 33%) and update cadence (every 2 months vs every 9 months). UNO Synth Editor's advantage is in-app purchases (none vs 10). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. SynthMaster One for iPhone sells 10 one-off in-app purchases. UNO Synth Editor asks for nothing beyond the download.

SynthMaster One for iPhone holds the better App Store score, 4.8 against 3.8. That said, the two scores are not equally well evidenced: SynthMaster One for iPhone has 331 ratings behind it against 11, so its average is the more settled of the two. Written reviews point the same way: 33% of UNO Synth Editor's written reviews are positive against 66% of SynthMaster One for iPhone's.

UNO Synth Editor ships an update every 9 months, SynthMaster One for iPhone every 2 months. The most recent releases landed on October 9, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | UNO Synth Editor | SynthMaster One for iPhone |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.8 (11 ratings)](https://appshunter.io/ios/app/uno-synth-editor/id1401362007/reviews) | **[4.8 (331 ratings)](https://appshunter.io/ios/app/synthmaster-one-for-iphone/id1490902617/reviews)** |
| Number of ratings | 11 | **331** |
| Positive reviews | 33.3% of reviews | **66.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 9 months | **Every 2 months** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 8 MB | 297 MB |
| Requires iOS | **9.3** | 10.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [IK Multimedia US, LLC](https://appshunter.io/developer/323694278) | [KV331 Audio](https://appshunter.io/developer/944155925) |

## What reviewers say

### UNO Synth Editor

[App page](https://appshunter.io/ios/app/uno-synth-editor/id1401362007)

This app provides advanced control for a specific analog synthesizer, allowing users to manage presets, shape sounds, and configure global and MIDI settings. It offers access to all synth engine elements and includes artist-created presets for inspiration.

**Highlights:** Preset management and transfer, Full control over synth engine, Sound shaping with envelopes and LFOs, Arpeggiator and keyboard controls, Global and MIDI settings configuration, Artist preset library

**In-app purchases:** none


### 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 UNO Synth Editor free?

UNO Synth Editor is free to download, with no in-app purchases.

### Is SynthMaster One for iPhone free?

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

### Which has better reviews, UNO Synth Editor or SynthMaster One for iPhone?

SynthMaster One for iPhone is rated higher. UNO Synth Editor averages 3.8 out of 5 from 11 ratings, while SynthMaster One for iPhone averages 4.8 from 331 ratings.

### Do UNO Synth Editor or SynthMaster One for iPhone have ads?

Neither UNO Synth Editor nor SynthMaster One for iPhone shows ads.

### Which is updated more often, UNO Synth Editor or SynthMaster One for iPhone?

UNO Synth Editor ships an update every 9 months, and SynthMaster One for iPhone every 2 months. Most recently, UNO Synth Editor was updated on October 9, 2026 and SynthMaster One for iPhone on October 14, 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.*