# SpaceTheremin vs Seaquence

The clearest difference is in-app purchases: SpaceTheremin at none against Seaquence's 1. SpaceTheremin also leads on review sentiment (100% vs 85%) and update cadence (every 2 months vs every 5 months). Seaquence's advantage is ratings volume (81 vs 4). On price, rating, ads and device support there is nothing between them.

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

SpaceTheremin holds the better App Store score, 4.8 against 4.6. That said, the two scores are not equally well evidenced: Seaquence has 81 ratings behind it against 4, so its average is the more settled of the two. Written reviews point the same way: 100% of SpaceTheremin's written reviews are positive against 85% of Seaquence's.

SpaceTheremin ships an update every 2 months, Seaquence every 5 months. The most recent releases landed on November 6, 2026 and November 2, 2026 respectively.

## The numbers

| Metric | SpaceTheremin | Seaquence |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (4 ratings)](https://appshunter.io/ios/app/spacetheremin/id884417701/reviews)** | [4.6 (81 ratings)](https://appshunter.io/ios/app/seaquence/id1106270489/reviews) |
| Number of ratings | 4 | **81** |
| Positive reviews | **100.0% of reviews** | 84.6% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 5 months |
| Monetization | **Free** | Free with in-app purchases |
| Size | 6 MB | 8 MB |
| Requires iOS | **6.0** | 11.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [YUKIO ONOZUKA](https://appshunter.io/developer/876684692) | [Okaynokay](https://appshunter.io/developer/1106270488) |

## What reviewers say

### SpaceTheremin

[App page](https://appshunter.io/ios/app/spacetheremin/id884417701)

Create unique soundscapes by touching and moving your screen to control pitch and cosmic delay effects. Explore various wave shapes and warp options to craft your sonic experience. This app offers a free version with limited multi-touch and a pro version for an ad-free, expanded experience.

**Highlights:** Touch and move screen for pitch control, Cosmic delay sounds, Multi-touch support (2 free, more in pro), Adjustable delay time and feedback, Multiple wave shapes (Sine, Saw, Square, Triangle, Noise), Warp and Softness controls

**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 SpaceTheremin free?

SpaceTheremin 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, SpaceTheremin or Seaquence?

SpaceTheremin is rated higher. SpaceTheremin averages 4.8 out of 5 from 4 ratings, while Seaquence averages 4.6 from 81 ratings.

### Do SpaceTheremin or Seaquence have ads?

Neither SpaceTheremin nor Seaquence shows ads.

### Which is updated more often, SpaceTheremin or Seaquence?

SpaceTheremin ships an update every 2 months, and Seaquence every 5 months. Most recently, SpaceTheremin was updated on November 6, 2026 and Seaquence on November 2, 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.*