GrainProc vs Pinkish Trombone
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!
Pinkish Trombone
This app is a studio-ready instrument for iOS, expanding on a classic web-based speech synthesizer. It offers multitouch playability with modulation options and automatable parameters, functioning as a standalone app or AUV3.
- Articulatory speech synthesizer
- Multitouch playability
- Modulation options
- Automatable parameters
- Standalone app
- AUV3 support
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Based on Neil Thapen's classic web-based interactive articulatory speech synthesizer, Pink Trombone, Pinkish expands the original into a studio-ready instrument for iOS. While staying faithful to the original's multitouch playability, Pinkish Trombone adds a suite of modulation options and automatable parameters that breath new life into that venerable vocal tract. Pinkish Trombone operates as a standalone app as well as an AUV3 so you can use it in any of your favorite iOS DAW apps. Apple Silicon macOS users can even use it in Ableton Live!
Screenshots
Verdict
The clearest difference is rating: Pinkish Trombone at 5.0 against GrainProc's 4.2. Pinkish Trombone also leads on review sentiment (100% vs 60%) and update cadence (fortnightly vs every 2 months). GrainProc's advantage is ratings volume (18 vs 2) and price ($2.99 vs $4.99). On ads, in-app purchases, monetization model 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
GrainProc costs $2.99 and Pinkish Trombone $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Pinkish Trombone 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 2, so its average is the more settled of the two. Written reviews point the same way: 60% of GrainProc's written reviews are positive against 100% of Pinkish Trombone's.
GrainProc ships an update every 2 months, Pinkish Trombone fortnightly. The most recent releases landed on November 1, 2026 and October 31, 2026 respectively.
| Parameter | GrainProc | Pinkish Trombone |
|---|---|---|
| Price | $2.99 — better | $4.99 |
| Rating | 4.2 (18 ratings) | 5.0 (2 ratings) — better |
| Positive reviews | 60.0% of reviews | 100.0% of reviews — better |
| Number of ratings | 18 — better | 2 |
| Update frequency | Every 2 months | Fortnightly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 16.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 6 MB | 55 MB |
| Age rating | 4+ | 4+ |
| Developer | Mayank Sanganeria | Aaron Meyers |
Customer experience
GrainProc
Pinkish Trombone
In-app purchases
GrainProc
No in-app purchases
Pinkish Trombone
No in-app purchases








