Midi Poly Grid vs GSDSP Quantum Granulator
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Midi Poly Grid
This app functions solely as a MIDI controller, requiring a host application or DAW to produce sound. It offers intuitive pad controls for melodies and finger drumming, with advanced modulation options like MPE and polyphonic aftertouch. Connect virtually or via USB/Bluetooth to other devices and DAWs.
- Size-adjustable grid of pads
- MPE and polyphonic aftertouch modulation
- Custom grid creation
- Virtual MIDI connection
- Preset saving
- Multiple layouts and colors
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# Midi Poly Grid This App is Open Source. Access the code here: https://github.com/anzbert/beat_pads ## Important Disclaimer This App is **ONLY** usable as a Midi Controller. It does **NOT** produce any sound on its own and requires a host application or a second device with a DAW or other sound production app. ## Information Midi Poly Grid is a lightweight Midi Controller app for mobile phones and tablets for melodies and finger drumming at home and on the go. Connections can be made virtually to other apps via platform midi channels, or via USB or Bluetooth Midi to other devices. This app aims to be an easy-to-use pad input device featuring a variety of layouts, intuitive playability and modern modulation options, such as MPE and Polyphonic Aftertouch. It was designed for people that prefer pads to pianos! The focus of this app is not to be a jack-of-all-trades Midi swiss army knife, but instead to be a great at one thing: Intuitive and versatile pad controls. ## Features - A size-adjustable grid of pads for finger drumming and melody input - Various layouts and colors, inspired by the Ableton Push - Presets can be saved with different pad setups - Innovative MPE and polyphonic Aftertouch modulation with graphical feedback - Push Style MPE pitchbend and slide - Send Velocity by Y position on pad, randomly or with a fixed value - Usable as a standard MIDI device with any PC, Mac or other USB or Bluetooth device - Optional controls, such as Pitch Bend, Mod Wheel and Sustain - Highligh a large number of musical scales - Receives Midi Notes, making the pads usable like a Launchpad - Custom grid creation based on the note intervals on the X and Y Axis to create Grids inspired by the Harmonic Table, Wicki Hayden, MidiMech and others - Supports virtual Midi connection to other apps on your device - Built-In support for the popular finger drumming courses from XpressPads.com - And more... ## Feedback and Contributions Anyone is most welcome to contribute, report an issue or start a discussion in the Github repository. Thanks! ## Licence Licenced under GPL3. The code in this project is freely usable in any other open source project. Enjoy! ## iOS Specific Information Can be used with any Mac via USB, Bluetooth Midi or WiFi. Usage with PC is limited to WiFi with free third-party software (rtpMidi), and USB with third-party USB midi connectors, due to Apple's limited implementation of USB Midi on iOS. AUv3 is unfortunately not supported at this time, as it is currently impossible with Flutter. More info about that here: https://github.com/flutter/flutter/issues/16092
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
Screenshots
Verdict
The clearest difference is price: Midi Poly Grid at $3.99 against GSDSP Quantum Granulator's $14.99. Midi Poly Grid also leads on update cadence (every 11 days vs every 5 weeks). GSDSP Quantum Granulator's advantage is iOS requirement (12.0 vs 15.0). On rating, review sentiment, 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
Midi Poly Grid costs $3.99 and GSDSP Quantum Granulator $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 Midi Poly Grid against 5.0 for GSDSP Quantum Granulator. Both are backed by a comparable volume of ratings — 8 and 7 respectively. Written reviews split almost evenly too, at 100% and 100% positive.
Midi Poly Grid ships an update every 11 days, GSDSP Quantum Granulator every 5 weeks. The most recent releases landed on September 9, 2026 and September 22, 2026 respectively.
| Parameter | Midi Poly Grid | GSDSP Quantum Granulator |
|---|---|---|
| Price | $3.99 — better | $14.99 |
| Rating | 5.0 (8 ratings) | 5.0 (7 ratings) |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| Number of ratings | 8 — better | 7 |
| Update frequency | Every 11 days — better | Every 5 weeks |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.0 | 12.0 — better |
| Further details — not scored | ||
| Size | 24 MB | 61 MB |
| Age rating | 4+ | 4+ |
| Developer | Andreas Mueller | Gustav Scholda |
Customer experience
Midi Poly Grid
GSDSP Quantum Granulator
In-app purchases
Midi Poly Grid
No in-app purchases
GSDSP Quantum Granulator
No in-app purchases
Questions
Is Midi Poly Grid free?
Is GSDSP Quantum Granulator free?
Which has better reviews, Midi Poly Grid or GSDSP Quantum Granulator?
Do Midi Poly Grid or GSDSP Quantum Granulator have ads?
Which is updated more often, Midi Poly Grid or GSDSP Quantum Granulator?
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