# IMPSY vs Marco Synth

The clearest difference is price: IMPSY at Free against Marco Synth's $4.99. Marco Synth's advantage is rating (5.0 vs 4.5) and update cadence (weekly vs every 4 months). On ratings volume, ads, in-app purchases and device support there is nothing between them.

IMPSY is free to download; Marco Synth costs $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Marco Synth holds the better App Store score, 5.0 against 4.5. Both are backed by a comparable volume of ratings — 2 and 4 respectively.

IMPSY ships an update every 4 months, Marco Synth weekly. The most recent releases landed on October 17, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | IMPSY | Marco Synth |
| --- | --- | --- |
| Price | **Free** | $4.99 |
| Rating | [4.5 (2 ratings)](https://appshunter.io/ios/app/impsy-intelligent-midi/id6771762122/reviews) | **[5.0 (4 ratings)](https://appshunter.io/ios/app/marco-synth/id6782900508/reviews)** |
| Number of ratings | 2 | **4** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Weekly** |
| Monetization | **Free** | Paid |
| Size | 18 MB | 6 MB |
| Requires iOS | **17.0** | 17.6 |
| Devices | **iPhone, iPad, Mac** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Charles Martin](https://appshunter.io/developer/560849533) | [Glenn Vassallo](https://appshunter.io/developer/914825403) |

## What reviewers say

### IMPSY

[App page](https://appshunter.io/ios/app/impsy-intelligent-midi/id6771762122)

This app acts as an AI MIDI partner, improvising musical responses to your playing. It can be used as an AUv3 plugin in DAWs or standalone, offering customizable AI models and MIDI mapping.

**Highlights:** AI-powered musical improvisation, AUv3 MIDI Processor for DAWs, Standalone Core MIDI virtual ports, Customizable AI model loading, Extensive MIDI mapping options, VoiceOver and Dynamic Type support

**Features:** Vision Pro support

**In-app purchases:** none


### Marco Synth

[App page](https://appshunter.io/ios/app/marco-synth/id6782900508)

This powerful synthesizer app offers a unique dual hard sync engine with four independent oscillators. Explore a vast sonic palette with intelligent randomization and a tactile workflow designed for sound discovery. It's suitable for both beginners and experienced musicians.

**Highlights:** Dual hard sync engine, Four independent oscillators, Intelligent randomization, Extensive waveform and filter options, Master FX bus, AUv3 plugin support, Built-in keyboard

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is IMPSY free?

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

### Is Marco Synth free?

Marco Synth costs $4.99, with no in-app purchases.

### Which has better reviews, IMPSY or Marco Synth?

Marco Synth is rated higher. IMPSY averages 4.5 out of 5 from 2 ratings, while Marco Synth averages 5.0 from 4 ratings.

### Do IMPSY or Marco Synth have ads?

Neither IMPSY nor Marco Synth shows ads.

### Which is updated more often, IMPSY or Marco Synth?

IMPSY ships an update every 4 months, and Marco Synth weekly. Most recently, IMPSY was updated on October 17, 2026 and Marco Synth on October 24, 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.*