GRFX vs Tone Chroma
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
Tone Chroma
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Tone Chroma is an interactive microtonal matrix for iOS, crafted for 21st century musicians. Both musical instrument and visualizer, Tone Chroma's interface breaks through the black-and-white mould of equal temperament and expands harmonic potential into a new universe of color. Features: - Play in real time on the color-coded microtonal tuning matrix with pure harmonic ratios - Seven visualizers — Lissajous curves, concurrent and countercurrent harmonograph, harmonic series, chromatic ring, tonal lattice, cymatics — each rendering sound as living color and form - Explore microtonal scales, ragas, and modal systems beyond 12-tone equal temperament with presets - MIDI input/output for use with external controllers and DAWs - Real-time microtonal note, frequency and interval information - Customizable tuning and chord banks Enter new harmonic horizons with Tone Chroma by exploring pure frequency relationships and synesthetic displays which allow you to hear and see universal vibrational patterns.
Screenshots
Verdict
The clearest difference is price: GRFX at $6.99 against Tone Chroma's $14.99. Tone Chroma's advantage is iOS requirement (14.0 vs 17.0). On ads, in-app purchases and device support 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
GRFX costs $6.99 and Tone Chroma $14.99 up front. Neither carries in-app purchases, so what you see is what you pay.
| Parameter | GRFX | Tone Chroma |
|---|---|---|
| Price | $6.99 — better | $14.99 |
| Rating | 4.6 (11 ratings) — better | — |
| Positive reviews | 77.8% of reviews | — |
| Number of ratings | 11 — better | — |
| Update frequency | Monthly | — |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | — |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 17.0 | 14.0 — better |
| Further details — not scored | ||
| Size | 117 MB | 4 MB |
| Age rating | 4+ | 4+ |
| Developer | Imaginando Lda | William Franke |
In-app purchases
GRFX
No in-app purchases
Tone Chroma
No in-app purchases









