# M vs GSDSP Quantum Filter

The clearest difference is review sentiment: GSDSP Quantum Filter at 100% against M's 0%. GSDSP Quantum Filter also leads on rating (5.0 vs 2.5) and in-app purchases (none vs 5). M's advantage is price (Free vs $14.99) and update cadence (every 3 weeks vs every 6 weeks). On ratings volume, device support and iOS requirement there is nothing between them.

M is free to download; GSDSP Quantum Filter costs $14.99 up front. M sells 5 in-app purchases, starting at $3.49 per month. GSDSP Quantum Filter asks for nothing beyond the download.

GSDSP Quantum Filter holds the better App Store score, 5.0 against 2.5. Both are backed by a comparable volume of ratings — 4 and 3 respectively. Written reviews point the same way: 0% of M's written reviews are positive against 100% of GSDSP Quantum Filter's.

M ships an update every 3 weeks, GSDSP Quantum Filter every 6 weeks. The most recent releases landed on November 3, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | M | GSDSP Quantum Filter |
| --- | --- | --- |
| Price | **Free** | $14.99 |
| Rating | [2.5 (4 ratings)](https://appshunter.io/ios/app/m-gen/id1484274043/reviews) | **[5.0 (3 ratings)](https://appshunter.io/ios/app/gsdsp-quantum-filter/id6498711920/reviews)** |
| Number of ratings | **4** | 3 |
| Positive reviews | 0.0% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | — | No |
| Update frequency | **Every 3 weeks** | Every 6 weeks |
| Monetization | **Free with in-app purchases** | Paid |
| Size | 25 MB | 77 MB |
| Requires iOS | **12.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Nick Carter-Bond](https://appshunter.io/developer/1162644925) | [Gustav Scholda](https://appshunter.io/developer/1642323227) |

## What reviewers say

### M

[App page](https://appshunter.io/ios/app/m-gen/id1484274043)

This app automatically composes original music based on your chosen settings for duration, tempo, and style. You can refine compositions by liking or disliking sections, and export generated music in MP3, MIDI, or sheet music formats. It's designed for content creators, producers, and music enthusiasts.

**Highlights:** Automated music composition, Customizable duration, tempo, and style, Like/Dislike feedback for refinement, Export in MP3, MIDI, and PDF formats, Track Editor for rewriting sections, Separate track generation (melody, harmony, bass, percussion)

**Features:** macOS Compatibility

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Commercial Use License | $3.49 | per month |
| Sharing Pack | $4.49 | per month |
| Library Expansion (+50 slots) | $2.99 | one-time |
| Library Expansion (+100 slots) | $4.99 | one-time |
| Downloads Pack | $6.99 | one-time |


### GSDSP Quantum Filter

[App page](https://appshunter.io/ios/app/gsdsp-quantum-filter/id6498711920)

This audio effect plugin offers analog-modeled filters with flexible routing and dynamic modulation for creative sound design. It provides extensive control over tone shaping and complex filtering with various filter types and configurations.

**Highlights:** Analog-modelled filters, 11 filter modes, Series and parallel routing, Dynamic modulation support, Stereo and dual mono modes, MIDI control integration

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is M free?

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

### Is GSDSP Quantum Filter free?

GSDSP Quantum Filter costs $14.99, with no in-app purchases.

### Which has better reviews, M or GSDSP Quantum Filter?

GSDSP Quantum Filter is rated higher. M averages 2.5 out of 5 from 4 ratings, while GSDSP Quantum Filter averages 5.0 from 3 ratings.

### Which is updated more often, M or GSDSP Quantum Filter?

M ships an update every 3 weeks, and GSDSP Quantum Filter every 6 weeks. Most recently, M was updated on November 3, 2026 and GSDSP Quantum Filter on October 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.*