# Motion Synth vs SynthMaster One for iPhone

The clearest difference is rating: SynthMaster One for iPhone at 4.8 against Motion Synth's 3.5. SynthMaster One for iPhone also leads on update cadence (every 2 months vs every 4 months) and ratings volume (331 vs 40). Motion Synth's advantage is in-app purchases (none vs 10). On price, review sentiment, ads and device support there is nothing between them.

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

SynthMaster One for iPhone holds the better App Store score, 4.8 against 3.5. That said, the two scores are not equally well evidenced: SynthMaster One for iPhone has 331 ratings behind it against 40, so its average is the more settled of the two. Written reviews complicate that: 73% of Motion Synth's written reviews are positive against 66% of SynthMaster One for iPhone's, so the app with the better star average is not the one people write more warmly about.

Motion Synth ships an update every 4 months, SynthMaster One for iPhone every 2 months. The most recent releases landed on October 13, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | Motion Synth | SynthMaster One for iPhone |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.5 (40 ratings)](https://appshunter.io/ios/app/motion-synth/id945266624/reviews) | **[4.8 (331 ratings)](https://appshunter.io/ios/app/synthmaster-one-for-iphone/id1490902617/reviews)** |
| Number of ratings | 40 | **331** |
| Positive reviews | **73.3% of reviews** | 66.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 2 months** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 48 MB | 297 MB |
| Requires iOS | **9.0** | 10.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [AUUG](https://appshunter.io/developer/945266623) | [KV331 Audio](https://appshunter.io/developer/944155925) |

## What reviewers say

### Motion Synth

[App page](https://appshunter.io/ios/app/motion-synth/id945266624)

This app turns your iPhone or iPod touch into a musical instrument. Play notes with touch and control sound with motion. It can be used standalone, with other iOS music apps, or even external hardware and laptop software.

**Highlights:** Play notes via touch, Shape sound through motion, Control in-app sounds, Control other iOS music apps, Control external hardware synths, Control laptop audio/visual software

**Features:** macOS Compatibility

**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 Motion Synth free?

Motion Synth 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, Motion Synth or SynthMaster One for iPhone?

SynthMaster One for iPhone is rated higher. Motion Synth averages 3.5 out of 5 from 40 ratings, while SynthMaster One for iPhone averages 4.8 from 331 ratings.

### Do Motion Synth or SynthMaster One for iPhone have ads?

Neither Motion Synth nor SynthMaster One for iPhone shows ads.

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

Motion Synth ships an update every 4 months, and SynthMaster One for iPhone every 2 months. Most recently, Motion Synth was updated on October 13, 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.*