GrainProc vs MetaSkew
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
GrainProc
Create unique sounds and musical textures in real-time by processing external audio. This app features two parallel granular engines for layering sounds, offering a versatile tool for musicians and sound designers.
- Real-time granular synthesis
- Two parallel grain engines
- AudioBus input support
- Waveform sound source manipulation
- Control over volume, feedback, and density
- Visual level monitoring
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GrainProc is a real-time granular synthesizer with which you can create new sounds and musical textures by affecting your voice, your instrument, or any input from AudioBus. 2 grain engines run in parallel, allowing you to layer two sounds and create rich textures, even as a solo performer! Features: • 2 Granular synthesizers running in parallel • Waveform representation of the sound allowing you to touch where you want the sound source to be • Sliders to control dry volume, wet volume, feedback level, and grain density • Visual level monitors of the dry, wet and feedback levels • Simple enough to be used with your feet! We discourage using your device with your feet, though it has been used that way for public performances!
MetaSkew
This audio effect processor offers granular delay and pitch-shifting for creating width, motion, and unique textures. Shape delay times, pitch intervals, grain size, and stereo spread with built-in LFO modulation and extensive preset categories. It's ideal for producers, musicians, and sound designers seeking controlled sonic damage and experimental soundscapes.
- Granular delay and pitch-shifting
- Adjustable grain size, smoothing, and gain
- Stereo spread and asymmetry control
- Built-in LFO modulation with multiple shapes
- Extensive preset categories for production jobs
- MIDI Learn for hardware control
- Standalone app and AUv3 plugin support
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MetaSkew is a granular delay and pitch-shift effect built for producers, musicians, and sound designers who want one processor for width, motion, ambience, and controlled damage. What you can shape: - Delay time from tight doubling to long phrase memory - Pitch from deep drops to shimmer intervals - Grain size, smoothing, and gain for soft clouds or chopped repeats - Feedback, pan, mix, and output for clean blend control - Latch for frozen textures and phrase-end captures - Spread and Skew for stereo width, asymmetry, and unstable character The signature Skew control is the fastest way to move from polished enhancement into unstable texture. Keep it low for subtle smear, or push it with Spread, Feedback, and LFO movement for broken motion. Modulation is built in. Three LFOs can run free or sync to musical divisions, with Sine, Triangle, Sample & Hold, and Saw shapes. Route movement to Delay, Pitch, Grain, Smoothing, Feedback, Mix, Pan, Spread, or Skew, then push subtle drift or obvious rhythmic motion. Presets are designed around real production jobs, not random patches. Browse Utility, Width, Pitch, Atmosphere, Motion, Rhythmic, Freeze, Destruction, and Signature categories. Save your own snapshots, recall them later, and keep user presets synced through iCloud when available. For hands-on control, MIDI Learn lets you map parameters to hardware. Default assignments cover the core effect, and MIDI CC broadcast can reflect parameter movement in connected setups. Use MetaSkew for: - Vocal throws and shimmer trails - Wide synth doubles and guitar halos - Drum stutters, glitch fills, and tempo-locked motion - Frozen pads and transition beds - Experimental resynthesis, smear, and warped ambience MetaSkew includes a standalone app and effect plugin for host apps that support AUv3 plug-ins.
Screenshots
Verdict
The clearest difference is price: GrainProc at $2.99 against MetaSkew's $14.99. GrainProc also leads on ratings volume (18 vs 1). MetaSkew's advantage is rating (5.0 vs 4.2) and device support (4 vs 2). On update cadence, ads, in-app purchases and monetization model 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
GrainProc costs $2.99 and MetaSkew $14.99 up front. Neither carries in-app purchases, so what you see is what you pay.
MetaSkew holds the better App Store score, 5.0 against 4.2. That said, the two scores are not equally well evidenced: GrainProc has 18 ratings behind it against 1, so its average is the more settled of the two.
GrainProc ships an update every 2 months, MetaSkew every 5 weeks. Both last shipped on November 1, 2026.
| Parameter | GrainProc | MetaSkew |
|---|---|---|
| Price | $2.99 — better | $14.99 |
| Rating | 4.2 (18 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 60.0% of reviews | — |
| Number of ratings | 18 — better | 1 |
| Update frequency | Every 2 months | Every 5 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Devices | iPhone, iPad | iPhone, iPad, Mac, Vision Pro — better |
| Requires iOS | 16.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 6 MB | 13 MB |
| Age rating | 4+ | 4+ |
| Developer | Mayank Sanganeria | Christian Thompson |
Customer experience
GrainProc
MetaSkew
In-app purchases
GrainProc
No in-app purchases
MetaSkew
No in-app purchases









