# Jam Synth vs GSDSP MMMm

The clearest difference is in-app purchases: GSDSP MMMm at none against Jam Synth's 4. GSDSP MMMm also leads on review sentiment (100% vs 84%) and update cadence (every 6 weeks vs every 4 months). On price, rating, ratings volume and ads there is nothing between them.

Both are free to download. Jam Synth sells 4 one-off in-app purchases. GSDSP MMMm asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for Jam Synth against 4.9 for GSDSP MMMm. Both are backed by a comparable volume of ratings — 28 and 14 respectively. Written reviews are what separate them: 84% of Jam Synth's written reviews are positive against 100% of GSDSP MMMm's.

Jam Synth ships an update every 4 months, GSDSP MMMm every 6 weeks. The most recent releases landed on October 6, 2026 and September 30, 2026 respectively.

## The numbers

| Metric | Jam Synth | GSDSP MMMm |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (28 ratings)](https://appshunter.io/ios/app/jam-synth/id732618765/reviews)** | [4.9 (14 ratings)](https://appshunter.io/ios/app/gsdsp-mmmm/id6450306205/reviews) |
| Number of ratings | **28** | 14 |
| Positive reviews | 84.2% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 6 weeks** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 5 MB | 44 MB |
| Requires iOS | 12.0 | 12.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Derek Mesecar](https://appshunter.io/developer/505825864) | [Gustav Scholda](https://appshunter.io/developer/1642323227) |

## What reviewers say

### Jam Synth

[App page](https://appshunter.io/ios/app/jam-synth/id732618765)

Transform your guitar into a synthesizer with this app. It accurately tracks pitch and amplitude to control digital oscillators, offering unique synth leads and effects. Go beyond MIDI with expressive, organic sounds and advanced modulation options.

**Highlights:** Monophonic guitar synthesizer, Pitch and amplitude tracking, Multiple oscillator wave shapes, Dynamic filter tracking, Advanced FX section (LFO, Delay, Harmonizer, etc.), MIDI output for external synths, High-accuracy pitch tuner

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Intelligent Harmonizer | Free | one-time |
| Rotary Vibe | Free | one-time |
| Rainbows | Free | one-time |
| Time Stopper | Free | 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

**In-app purchases:** none


## Frequently asked questions

### Is Jam Synth free?

Jam Synth 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, Jam Synth or GSDSP MMMm?

Jam Synth is rated higher. Jam Synth averages 5.0 out of 5 from 28 ratings, while GSDSP MMMm averages 4.9 from 14 ratings.

### Do Jam Synth or GSDSP MMMm have ads?

Neither Jam Synth nor GSDSP MMMm shows ads.

### Which is updated more often, Jam Synth or GSDSP MMMm?

Jam Synth ships an update every 4 months, and GSDSP MMMm every 6 weeks. Most recently, Jam Synth was updated on October 6, 2026 and GSDSP MMMm on September 30, 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.*