# Thesys vs Theremini Advanced Software Editor

The clearest difference is rating: Thesys at 4.7 against Theremini Advanced Software Editor's 3.8. Thesys also leads on ratings volume (85 vs 13). Theremini Advanced Software Editor's advantage is in-app purchases (none vs 1) and iOS requirement (5.1.1 vs 17.6). On price, review sentiment, update cadence and ads there is nothing between them.

Both are free to download. Thesys sells 1 one-off in-app purchase. Theremini Advanced Software Editor asks for nothing beyond the download.

Thesys holds the better App Store score, 4.7 against 3.8. That said, the two scores are not equally well evidenced: Thesys has 85 ratings behind it against 13, so its average is the more settled of the two. Written reviews split almost evenly too, at 59% and 60% positive.

Thesys ships an update every 3 months, Theremini Advanced Software Editor every 4 months. The most recent releases landed on August 9, 2026 and June 1, 2026 respectively.

## The numbers

| Metric | Thesys | Theremini Advanced Software Editor |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (85 ratings)](https://appshunter.io/ios/app/thesys/id655513441/reviews)** | [3.8 (13 ratings)](https://appshunter.io/ios/app/theremini-advanced-software-editor/id929763039/reviews) |
| Number of ratings | **85** | 13 |
| Positive reviews | 59.3% of reviews | **60.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 4 months |
| Monetization | Free with in-app purchases | **Free** |
| Size | 28 MB | 50 MB |
| Requires iOS | 17.6 | **5.1.1** |
| Devices | iPad | iPad |
| Age rating | 4+ | 4+ |
| Developer | [Sugar Bytes GmbH](https://appshunter.io/developer/614418826) | [Moog Music Inc.](https://appshunter.io/developer/396776421) |

## What reviewers say

### Thesys

[App page](https://appshunter.io/ios/app/thesys/id655513441)

This app is a powerful and intuitive MIDI step sequencer for creating complex musical patterns. It offers extensive control over MIDI devices, enabling organic bass lines, leads, and pads for studio or live performance. Advanced features allow for real-time pattern manipulation directly from a MIDI keyboard.

**Highlights:** MIDI Step Sequencer, Pattern Creation, Live Performance Options, Real-time Pattern Manipulation, Integrated Synth, Action Section (Gatetime, Looper, Slowdown), Ableton Link Support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Thesys Full Version | $19.99 | one-time |


### Theremini Advanced Software Editor

[App page](https://appshunter.io/ios/app/theremini-advanced-software-editor/id929763039)

This application allows users to deeply customize and manage sounds for their Moog Theremini hardware synthesizer. It provides tools to create new presets, edit existing ones, and organize sound libraries. Users can also access an exclusive library of new presets to enhance their creative process.

**Highlights:** Create new presets, Edit existing presets, Craft new sounds in real-time, Manage preset libraries, Share sound libraries, Edit global settings

**In-app purchases:** none


## Frequently asked questions

### Is Thesys free?

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

### Is Theremini Advanced Software Editor free?

Theremini Advanced Software Editor is free to download, with no in-app purchases.

### Which has better reviews, Thesys or Theremini Advanced Software Editor?

Thesys is rated higher. Thesys averages 4.7 out of 5 from 85 ratings, while Theremini Advanced Software Editor averages 3.8 from 13 ratings.

### Do Thesys or Theremini Advanced Software Editor have ads?

Neither Thesys nor Theremini Advanced Software Editor shows ads.

### Which is updated more often, Thesys or Theremini Advanced Software Editor?

Thesys ships an update every 3 months, and Theremini Advanced Software Editor every 4 months. Most recently, Thesys was updated on August 9, 2026 and Theremini Advanced Software Editor on June 1, 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.*