# Thesys vs GSDSP MMM

The clearest difference is in-app purchases: GSDSP MMM at none against Thesys's 1. GSDSP MMM also leads on update cadence (every 5 weeks vs every 2 months) and device support (3 vs 1). On price, rating, review sentiment and ratings volume there is nothing between them.

Both are free to download. Thesys sells 1 one-off in-app purchase. GSDSP MMM asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 4.7 for Thesys against 4.7 for GSDSP MMM. Both are backed by a comparable volume of ratings — 86 and 36 respectively. Written reviews are what separate them: 59% of Thesys's written reviews are positive against 67% of GSDSP MMM's.

Thesys ships an update every 2 months, GSDSP MMM every 5 weeks. The most recent releases landed on November 1, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | Thesys | GSDSP MMM |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.7 (86 ratings)](https://appshunter.io/ios/app/thesys/id655513441/reviews) | **[4.7 (36 ratings)](https://appshunter.io/ios/app/gsdsp-mmm/id6443846329/reviews)** |
| Number of ratings | **86** | 36 |
| Positive reviews | 59.3% of reviews | **66.7% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 5 weeks** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 29 MB | 65 MB |
| Requires iOS | 17.6 | **13.0** |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Sugar Bytes GmbH](https://appshunter.io/developer/614418826) | [Gustav Scholda](https://appshunter.io/developer/1642323227) |

## 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 |


### GSDSP MMM

[App page](https://appshunter.io/ios/app/gsdsp-mmm/id6443846329)

This app offers a robust MIDI modulation engine for controlling various instruments and plugins. It allows users to create dynamic audio with LFOs, random sources, and more, featuring a performance-focused interface for live use.

**Highlights:** MIDI CC control for plugins and hardware, LFOs, random sources, and envelope followers, Audio-based modulation capabilities, Dedicated Performance Skin for live use, AUv3 audio effect plugin, Desktop versions for Windows and macOS

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Thesys free?

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

### Is GSDSP MMM free?

GSDSP MMM is free to download, with no in-app purchases.

### Which has better reviews, Thesys or GSDSP MMM?

GSDSP MMM is rated higher. Thesys averages 4.7 out of 5 from 86 ratings, while GSDSP MMM averages 4.7 from 36 ratings.

### Do Thesys or GSDSP MMM have ads?

Neither Thesys nor GSDSP MMM shows ads.

### Which is updated more often, Thesys or GSDSP MMM?

Thesys ships an update every 2 months, and GSDSP MMM every 5 weeks. Most recently, Thesys was updated on November 1, 2026 and GSDSP MMM on November 3, 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.*