# Thesys vs GSDSP MMMm

Thesys and GSDSP MMMm both sit at 4.7 stars, but that hides the real split: 100% of GSDSP MMMm's written reviews are positive against 59% of Thesys's. GSDSP MMMm also leads on in-app purchases (none vs 1) and update cadence (every 5 weeks vs every 2 months). Thesys's advantage is ratings volume (85 vs 16). On price, rating and ads there is nothing between them.

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

GSDSP MMMm holds the better App Store score, 4.9 against 4.7. That said, the two scores are not equally well evidenced: Thesys has 85 ratings behind it against 16, so its average is the more settled of the two. Written reviews point the same way: 59% of Thesys's written reviews are positive against 100% of GSDSP MMMm's.

Thesys ships an update every 2 months, GSDSP MMMm every 5 weeks. The most recent releases landed on October 29, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | Thesys | GSDSP MMMm |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.7 (85 ratings)](https://appshunter.io/ios/app/thesys/id655513441/reviews) | **[4.9 (16 ratings)](https://appshunter.io/ios/app/gsdsp-mmmm/id6450306205/reviews)** |
| Number of ratings | **85** | 16 |
| Positive reviews | 59.3% of reviews | **100.0% 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 | 44 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 MMMm

[App page](https://appshunter.io/ios/app/gsdsp-mmmm/id6450306205)

This app provides a powerful MIDI modulation engine to control various plugins, hardware, and instruments. It offers a range of modulation sources like LFOs and random generators, and includes a dedicated performance skin for live use. It's a MIDI-only FX version for hosts requiring pure MIDI processing.

**Highlights:** MIDI CC control for plugins and hardware, LFO, Random, Envelope Follower modulators, XY pads for modulation, Dedicated Performance Skin for live use, AUv3 MIDI FX plugin, Desktop versions available

**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 MMMm free?

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

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

GSDSP MMMm is rated higher. Thesys averages 4.7 out of 5 from 85 ratings, while GSDSP MMMm averages 4.9 from 16 ratings.

### Do Thesys or GSDSP MMMm have ads?

Neither Thesys nor GSDSP MMMm shows ads.

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

Thesys ships an update every 2 months, and GSDSP MMMm every 5 weeks. Most recently, Thesys was updated on October 29, 2026 and GSDSP MMMm on October 27, 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.*