HxMIDI Tools vs GRFX
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
HxMIDI Tools
This software allows owners of CME USB MIDI Host products to update firmware and fully configure their devices. Users can manage routing, mapping, and filtering of MIDI and USB inputs and outputs.
- Firmware updates for CME USB MIDI Hosts
- Configure routing between MIDI and USB inputs/outputs
- Filter incoming MIDI events
- Map incoming MIDI events to others
- Full product configuration
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HxMIDI Tools, the software dedicated to CME USB MIDI Hosts products owners. With this software, you will be able to update the firmware of your CME Pro H4MIDI WC, H2MIDI Pro, H12MIDI Pro as well as all other products to come. The software is also used to fully configure your product, you have an access to the routing, mapping and filtering features. With this software you will be able to configure routing to each MIDI and USB input, you can decide to route any input to any output. You can also decide to filter any incoming MIDI event so it is not forwarded to the routed output. The latest version also offers the possibility to map any incoming MIDI event to another one, and much more
GRFX
Transform ordinary audio into unique sonic textures, evolving soundscapes, and rhythmic glitches. This app offers precise control over sound manipulation with a unique pitch controller, multiple LFOs, and a flexible multi-effect chain. Create complex and immersive audio transformations in real-time.
- Granular engine for textures and rhythms
- Harmonic Triangle pitch controller
- Multi-effect chain with probabilistic routing
- Four self-modulating LFOs
- Real-time audio sculpting
- AUv3 plugin and standalone app
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GRFX is a powerful and creative granular effects processor that turns ordinary audio into extraordinary sonic landscapes. Slice your sound into grains and reshape them into evolving textures, shimmering chords, rhythmic glitches, haunting drones, and more. At the heart of GRFX is the Harmonic Triangle – an intuitive 3-way pitch controller that lets you morph simple tones into lush pads, arpeggiated patterns, or abstract gestures. Whether you’re aiming for organic soundscapes or synchronized stutters, GRFX gives you precise control over the flow of grains and modulation. Build complexity with four self-modulating LFOs, a multi-effect chain with probabilistic routing, and an elegant drag-and-drop modulation system. Shape your sound, modulate nearly every parameter, and sculpt immersive audio transformations in real time. Key Features: - Granular engine for creating textures, rhythms, chords, glitches, drones, ambiences, and more - Harmonic Triangle for 3-way pitch control, detuning, and microtonality - Built-in Chord Selector with 32 triads for instant harmonic richness - Grain envelope shaping for plucky, smooth, or abrupt grains - Buffer size, division, sync, and freeze controls - Rhythmic synchronization for tempo-synced effects and patterns - 4 LFOs with self-modulation and drag-and-drop assignment - Modulation panel & view mode for streamlined modulation management - 2 Multi-Effect slots (Filter, Distortion, Delay, Peak EQ, Chorus, Phaser, Bitcrusher, Reverb) with probability-based routing - Dedicated Send FX with Delay and Reverb in series or parallel mode - Flexible mixer section for sculpting wet/dry balance and routing AUv3 Audio Unit plugin – requires an AUv3-compatible host app such as Logic Pro, GarageBand, AUM, or Cubasis. Standalone version included.
Screenshots
Verdict
HxMIDI Tools and GRFX both sit at 4.5 stars, but that hides the real split: 78% of GRFX's written reviews are positive against 0% of HxMIDI Tools's. HxMIDI Tools's advantage is price (Free vs $6.99) and device support (4 vs 2). On rating, ratings volume, update cadence 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
HxMIDI Tools is free to download; GRFX costs $6.99 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 — 4.5 for HxMIDI Tools against 4.6 for GRFX. Both are backed by a comparable volume of ratings — 4 and 11 respectively. Written reviews are what separate them: 0% of HxMIDI Tools's written reviews are positive against 78% of GRFX's.
HxMIDI Tools ships an update every 2 weeks, GRFX monthly. The most recent releases landed on October 4, 2026 and October 12, 2026 respectively.
| Parameter | HxMIDI Tools | GRFX |
|---|---|---|
| Price | Free — better | $6.99 |
| Rating | 4.5 (4 ratings) | 4.6 (11 ratings) — better |
| Positive reviews | 0.0% of reviews | 77.8% of reviews — better |
| Number of ratings | 4 | 11 — better |
| Update frequency | Every 2 weeks — better | Monthly |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free — better | Paid |
| Devices | iPhone, iPad, iPod, Mac — better | iPhone, iPad |
| Requires iOS | 12.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 6 MB | 117 MB |
| Age rating | 4+ | 4+ |
| Developer | CME PTE. LTD. | Imaginando Lda |
Customer experience
HxMIDI Tools
GRFX
In-app purchases
HxMIDI Tools
No in-app purchases
GRFX
No in-app purchases









