# Motion Synth vs Seaquence

The clearest difference is rating: Seaquence at 4.6 against Motion Synth's 3.5. Seaquence also leads on review sentiment (85% vs 73%). Motion Synth's advantage is in-app purchases (none vs 1) and iOS requirement (9.0 vs 11.0). On price, ratings volume, update cadence and ads there is nothing between them.

Both are free to download. Seaquence sells 1 one-off in-app purchase. Motion Synth asks for nothing beyond the download.

Seaquence holds the better App Store score, 4.6 against 3.5. Both are backed by a comparable volume of ratings — 40 and 81 respectively. Written reviews point the same way: 73% of Motion Synth's written reviews are positive against 85% of Seaquence's.

Motion Synth ships an update every 4 months, Seaquence every 5 months. The most recent releases landed on October 24, 2026 and October 20, 2026 respectively.

## The numbers

| Metric | Motion Synth | Seaquence |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.5 (40 ratings)](https://appshunter.io/ios/app/motion-synth/id945266624/reviews) | **[4.6 (81 ratings)](https://appshunter.io/ios/app/seaquence/id1106270489/reviews)** |
| Number of ratings | 40 | **81** |
| Positive reviews | 73.3% of reviews | **84.6% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 4 months** | Every 5 months |
| Monetization | **Free** | Free with in-app purchases |
| Size | 48 MB | 8 MB |
| Requires iOS | **9.0** | 11.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [AUUG](https://appshunter.io/developer/945266623) | [Okaynokay](https://appshunter.io/developer/1106270488) |

## 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


### Seaquence

[App page](https://appshunter.io/ios/app/seaquence/id1106270489)

Create dynamic, layered music with a unique visual interface. Explore ambient drones, intricate rhythms, and share your creations with a global community. Unlock advanced tools and MIDI support with an optional upgrade.

**Highlights:** Polyphonic synth engine, Dynamic spatial mixer, Multitouch interface, Visual voice editor, Step-sequencer matrix, Social sharing features, Audio/Video recording

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Seaquence Complete | $9.99 | one-time |

**What reviewers like**

- 🎶 Great sound and musicality
- 🎨 Beautiful design and visuals
- 💡 Innovative and creative concept
- 🎧 Inspiring for musicians
- 🕹️ Fun and easy to use

**What reviewers complain about**

- 🐛 App crashes on launch
- 🚫 MIDI function doesn't work
- 🎛️ Menu system is difficult
- 📱 Not opening on some devices
- 🖼️ Portrait mode only

**Reported bugs**

- App immediately crashes upon launch
- MIDI function doesn't work
- Menu system is confusing
- App not opening on iPhone 12 mini
- App kicks user back to home page

**Requested features**

- Mix sound with other apps (AUM/Audiobus)
- Airplay support
- Zoom in/out for larger creature populations
- Audio Unit support
- Manual in the app (PDF version)


## Frequently asked questions

### Is Motion Synth free?

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

### Is Seaquence free?

Seaquence is free to download, with in-app purchases available.

### Which has better reviews, Motion Synth or Seaquence?

Seaquence is rated higher. Motion Synth averages 3.5 out of 5 from 40 ratings, while Seaquence averages 4.6 from 81 ratings.

### Do Motion Synth or Seaquence have ads?

Neither Motion Synth nor Seaquence shows ads.

### Which is updated more often, Motion Synth or Seaquence?

Motion Synth ships an update every 4 months, and Seaquence every 5 months. Most recently, Motion Synth was updated on October 24, 2026 and Seaquence on October 20, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*