GSDSP Quantum Granulator vs VAPolyTZFM
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
GSDSP Quantum Granulator
This live granular processor allows you to break down audio into small pieces or create atmospheric soundscapes. It features dual live buffers, a musical grain engine with tempo sync, and expressive pitch control with MIDI support. Shape your sound with an intuitive XY pad and mix section for detailed sonic manipulation.
- Dual live recording buffers
- Tempo-synced grain triggering
- Expressive pitch control with scales
- 2D XY pad for grain shaping
- MIDI playable granular instrument
- AUv3 audio effect plugin
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This Live Granular Processor lets you decompose audio into bits and pieces or lovely clouds. Dual Live Buffers Quantum Granulator is a powerful live granular processor designed for deep, hands-on sonic manipulation in real-time. Two independent recording buffers capture your signal and let you freeze, loop, or continuously record audio for instant transformation. Whether you’re sampling from the Main Input, Sidechain A, or Sidechain B, you’re in full control of what goes in — and what comes out. Musical Grain Engine Trigger grains freely in Hz or lock them to tempo for tight rhythmic effects. Adjust grain length, offset and density — from crisp stutters to blurred, cinematic clouds. Randomization adapts to your mode: in Hz it behaves like a geiger counter, adding sharp, bursty unpredictability; in BPM sync it becomes more spray-like, scattering grains around the beat for rhythmically coherent textures. Expressive Pitch Control Our easy-to-use scale picker lets you quantize grains to 30+ built-in musical scales, create your own, or let randomness take over. Play grains via MIDI to turn Quantum Granulator into an expressive granular instrument. Pitch shifting covers a broad ±24 semitone range and a separate fine control allows subtle adjustments within ±1 semitone, perfect for microtonal tuning or adding vibrato-like motion. Versatile Grain Shaping An intuitive 2D Envelope XY pad lets you sharpen or soften vertically, adjust attack and release horizontally. Control level, panning, and filtering to craft subtle movement or fully chaotic sound clusters. Shape the balance using the mix section — from subtle texture to complete granular obliteration. Granular Synthesis, Made Playable Quantum Granulator isn’t just a tool — it’s an instrument. Built for performers, producers, and sound explorers alike, it offers a deep but immediate interface into the world of granular synthesis, with every detail tuned for musicality and expression. Quantum Granulator 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
VAPolyTZFM
This app is a polyphonic synthesizer that utilizes Through Zero FM for musical sound generation. It offers a standalone mode with Ableton Link and MIDI support, as well as an AudioUnit Extension for use with other music software. Built-in effects and iCloud Drive integration enhance its creative capabilities.
- Through Zero FM synthesis
- AudioUnit Extension (AUv3) support
- Ableton Link and MIDI connectivity
- Built-in effects suite
- iCloud Drive project sharing
- Analog style step sequencer
- Up to 8 voice polyphony
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VAPolyTZFM is polyphonic synthesizer featuring Through Zero FM, which is a type of linear frequency modulation and it is capable to maintain the pitch therefore it can deliver more musical results. VAPolyTZFM operates as a stand alone or as an AudioUnit Extension (AUv3) for iPhone, iPad and Mac. Stand Alone supports Ableton Link, MIDI and audio file export. Built-in Effects include delay, chorus, flanger, reverb, eq and compressor. Project files can be saved in iCloud Drive, so that the project can be accessed from iPhone, iPad or Mac. Main Features Through Zero FM Analog Style Step Sequencer. Eight Assignable Controllers. Maximum 8 voice polyphony. it depends on performance of the device it is running. Built-in effects and piano roll sequencer. Audio Export. Linear PCM format (AIFF, WAV and CAF) and compressed format (AAC) Support Audio Unit Extension (AUv3). Support MIDI 2.0. Support Foot Pedal and Per Note Control. Support Ableton Link, Bluetooth MIDI, MIDI In / Out. Works on iPhone, iPad and Mac. Support iCloud Drive to share project files between the platforms. Include 256 Factory Presets. Improvements Support MIDI Foot Pedal (CC#11, CC#64) Support MIDI2.0 Per Note Control Messages MIDI CC Settings are saved. It will be recovered when the app launched in the next time. System Requirements iOS 17.0 or later Devices with Apple Silicon are recommended. A13 Fusion or above is highly recommended. if sound is distorted when using a device with less CPU power, reduce number of voices. AudioUnit Extension (AUv3) requires host application which support AudioUnit Extension. AudioUnit Extension is supported by Apple Logic and Apple Garage Band on iOS and macOS. For any other DAW, it depends on the application and some of them don’t support AudioUnit Extension.
Screenshots
Verdict
GSDSP Quantum Granulator and VAPolyTZFM both sit at 5.0 stars, but that hides the real split: 100% of GSDSP Quantum Granulator's written reviews are positive against 50% of VAPolyTZFM's. GSDSP Quantum Granulator also leads on update cadence (every 6 weeks vs every 9 months) and iOS requirement (13.0 vs 16.6). On price, rating, ratings volume and ads 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
GSDSP Quantum Granulator costs $14.99 and VAPolyTZFM $14.99 up front. Neither carries in-app purchases, so what you see is what you pay.
On the App Store both sit at effectively the same score — 5.0 for GSDSP Quantum Granulator against 5.0 for VAPolyTZFM. Both are backed by a comparable volume of ratings — 7 and 3 respectively. Written reviews are what separate them: 100% of GSDSP Quantum Granulator's written reviews are positive against 50% of VAPolyTZFM's.
GSDSP Quantum Granulator ships an update every 6 weeks, VAPolyTZFM every 9 months. The most recent releases landed on October 30, 2026 and November 5, 2026 respectively.
| Parameter | GSDSP Quantum Granulator | VAPolyTZFM |
|---|---|---|
| Price | $14.99 | $14.99 |
| Rating | 5.0 (7 ratings) | 5.0 (3 ratings) |
| Positive reviews | 100.0% of reviews — better | 50.0% of reviews |
| Number of ratings | 7 — better | 3 |
| Update frequency | Every 6 weeks — better | Every 9 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Requires iOS | 13.0 — better | 16.6 |
| Further details — not scored | ||
| Size | 61 MB | 17 MB |
| Age rating | 4+ | 4+ |
| Developer | Gustav Scholda | Ryo Togawa |
Customer experience
GSDSP Quantum Granulator
VAPolyTZFM
In-app purchases
GSDSP Quantum Granulator
No in-app purchases
VAPolyTZFM
No in-app purchases
Questions
Is GSDSP Quantum Granulator free?
Is VAPolyTZFM free?
Which has better reviews, GSDSP Quantum Granulator or VAPolyTZFM?
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Which is updated more often, GSDSP Quantum Granulator or VAPolyTZFM?
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