# Jam Synth vs GSDSP MMM

The clearest difference is in-app purchases: GSDSP MMM at none against Jam Synth's 4. GSDSP MMM also leads on update cadence (every 6 weeks vs every 4 months). Jam Synth's advantage is review sentiment (84% vs 75%). 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 MMM asks for nothing beyond the download.

Jam Synth holds the better App Store score, 5.0 against 4.8. Both are backed by a comparable volume of ratings — 28 and 34 respectively. Written reviews point the same way: 84% of Jam Synth's written reviews are positive against 75% of GSDSP MMM's.

Jam Synth ships an update every 4 months, GSDSP MMM every 6 weeks. The most recent releases landed on September 18, 2026 and August 21, 2026 respectively.

## The numbers

| Metric | Jam Synth | GSDSP MMM |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (28 ratings)](https://appshunter.io/ios/app/jam-synth/id732618765/reviews)** | [4.8 (34 ratings)](https://appshunter.io/ios/app/gsdsp-mmm/id6443846329/reviews) |
| Number of ratings | 28 | **34** |
| Positive reviews | **84.2% of reviews** | 75.0% 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 | 65 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 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

**In-app purchases:** none


## Frequently asked questions

### Is Jam Synth free?

Jam Synth 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, Jam Synth or GSDSP MMM?

Jam Synth is rated higher. Jam Synth averages 5.0 out of 5 from 28 ratings, while GSDSP MMM averages 4.8 from 34 ratings.

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

Neither Jam Synth nor GSDSP MMM shows ads.

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

Jam Synth ships an update every 4 months, and GSDSP MMM every 6 weeks. Most recently, Jam Synth was updated on September 18, 2026 and GSDSP MMM on August 21, 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.*