Comparison

M vs GSDSP Quantum Filter

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

M

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
Read full description

For best results, please use headphones/speakers and stable broadband connection. M-Gen is a unique app that automatically composes musical content for: - Content creators - Music producers - Games creators - Students of music - Music lovers Simply tap the red button and send the generated music to your Email account or Google Drive in the following formats: - MP3 - for listening or mixing - MIDI - for using with DAW software - PDF - for reading and playing sheet music Please use earphones/speakers for best results. Also, this app has NO ADS! ==========FREE FUNCTIONALITY========== - endless source of musical compositions and ideas - keep tapping the red button until you hear something you like - use the Setup Wizard to adjust duration, tempo and style of song - use Track Editor to have tracks re-written until you love the song - select melody/harmony/bassline/percusion/effects tracks to be generated separately or together as a song - use Like/Dislike buttons whilst listening to rewrite sections of a song - select the number of instrumental layers in each track (4 max, 8 for percussion) - select key/tempo/soundset/style - select structure of song using chorus/verse/middle-eight sections - name and then store up to 5 generated songs on your device for later listening ==========IN-APP PURCHASES========== - Downloads Pack (one-off payment) - send MP3, MIDI and PDF (sheet music) files of the generated music to your Email account or Google Drive. - Library Expansion (one-off payment) - increase the number of slots in your device's M-Gen library so you can store more songs for later listening - 'License Pack' (subscription) - License to use M-Gen music in your own work and distribute it on a commercial basis M-Gen ("Music Generator") creates random yet tonally and rhythmically integrated songs based on a number of settings you can play with in the Setup section together with user feedback on previous songs. You can use the Setup Wizard in the Play tab to quickly and easily configure duration, speed and style of the song. During playback, you can tap like/dislike buttons. Disliked sections can be rewritten by M-gen, keeping the rest of the song intact. Liked sections will provide M-Gen with clues as to how you like your songs to sound that will be used when composing future songs or song parts. The algorithms used by M-Gen are always evolving and improving to include more possible musical structures and methods of composition. The app has no advertising and there's no need to set up an account. Simple! ==========MIDI TRACKS========== In your DAW, the following generated tracks use these MIDI track numbers: Percussion - 10 Bassline - 11 Harmony - 12 Melody - 13 Effects - 14 Enjoy!!!

About

GSDSP Quantum Filter

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
Read full description

Analog warmth meets flexible routing and dynamic modulation in a filter workstation built for creative sound design. Analog-Modelled Filters Quantum Filter uses resonant, analog-modelled filter designs that behave smoothly and musically across the entire spectrum. With no cramping, stepping, or digital artefacts, the filters remain stable even under rapid modulation. At high resonance settings they can reach self-oscillation, similar to classic hardware circuits. Filter Types & Routing Choose from 11 filter modes, including Lowpass, Highpass, Bandpass, Notch, Shelving options, Bell, and Ladder Lowpass in 1–4 pole configurations. Combine filters in series (up to three stages) or parallel (up to two), resulting in over 2,000 possible routing combinations for detailed tone shaping and complex layered filtering. Built for Modulation Designed to handle fast, artefact-free modulation, Quantum Filter responds cleanly even under rapid parameter changes. Its stability makes it suitable for dynamic environments, rhythmic modulation, or complex movement across multiple filter stages. Stereo and Dual Mono Switch between stereo and dual mono modes to shape the stereo image. In dual mono mode, left and right channels can move independently, enabling asymmetric movement, wider imaging, or separate modulation paths for each side. MIDI Control Quantum Filter integrates ADSR & AR modulators that respond directly to MIDI, allowing envelope-driven filter motion that behaves like a synthesizer’s filter section. This integration adds expressive control for rhythmic gating, animated sweeps, and dynamic shaping based on your playing or sequencing. Quantum Filter is an AUv3 audio effect plugin compatible with Logic Pro, AUM, Cubasis, GarageBand and many more. A Desktop version is also available for Windows and macOS (VST3 / AU / AAX). More information here: https://gs-dsp.com/products

Screenshots

M4 screens
GSDSP Quantum Filter3 screens

Verdict

The call

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.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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.

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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.

Scorecard6 real differences · 4 level
M versus GSDSP Quantum Filter: the parameters behind the verdict, then further details
ParameterMGSDSP Quantum Filter
PriceFree — better$14.99
Rating2.5 (4 ratings)5.0 (3 ratings) — better
Positive reviews0.0% of reviews100.0% of reviews — better
Number of ratings4 — better3
Update frequencyEvery 3 weeks — betterEvery 6 weeks
Ads—No
In-app purchasesYesNo — better
MonetizationFree with in-app purchases — betterPaid
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS12.0 — better13.0
Further details — not scored
Size25 MB77 MB
Age rating4+4+
DeveloperNick Carter-BondGustav Scholda

Customer experience

M

All ratings4 ratings
Positive25.0%
Neutral25.0%
Negative50.0%
Written reviews2 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

GSDSP Quantum Filter

All ratings3 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

5 purchases

M

Subscriptions2
  • Commercial Use License$3.491 Month
  • Sharing Pack$4.491 Month
One-time3
  • Library Expansion (+50 slots)$2.99
  • Library Expansion (+100 slots)$4.99
  • Downloads Pack$6.99
None

GSDSP Quantum Filter

No in-app purchases

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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